The leaked episode list for season 5 leads me to believe that Scootaloo gets her cutie mark.
Cutie Mark Magic - Part 1
Curious as to why the castle appeared, Twilight and her friends investigate a mysterious map that leads them to a strange town.
502: Cutie Mark Magic - Part 2
Fearing a trap, Twilight turns to Discord to help rescue her friends from Maredane.
503: The Crystal Caper
The map sends the ponies to the Crystal Empire, where they must help the crystal ponies without letting Princess Cadance know.
504: Seed No Evil
Babs Seed returns to Ponyville, but Applebloom soon notices her cousin slipping back into her old habits.
505: Over the Moon
Princess Luna summons Twilight to help her interpret a vision about a falling star.
506: A Hoof-full of Apples
The map sends the ponies to Appleloosa, where the townfolk are blaming the buffalo for a bad crop of apples.
507: Princess Pandemonium
During a royal summit, the princesses find themselves entertaining some difficult dignitaries.
508: Fawnder over Yonder
Fluttershy travels to White Tail Wood, where she meets a deer who is even more shy than she is.
509: The Centennial Celebration
Twilight and her friends lead the festivities of of the 100th anniversary of the founding of Ponyville, but soon find themselves overwhelmed when everyony from all over Equestria comes to participate.
510: Star-Spangled Banter
With the falling star drawing closer, Twilight has to persuade the Mayor to help her prepare.
511: Sweetie Spy
Diamond Tiara recruits Sweetie Belle to help her eavesdrop on the other ponies competing in Ponyville Idol.
512: Diamond in the Dust
Rarity is summoned to be a judge for a fashion show in Canterlot, but constantly finds herself being outshined.
513: Balder-Dash
The map sends the ponies to Cloudsdale, where Rainbow Dash learns that Spitfire wants to quit the Wonderbolts.
514: Gem in the Dragon's Hands
When the dragons of Equestria learn of a rare gem in the mountains, Spike begs Twilight to let him go find it.
515: Scoot Over
When Shining Armor comes to Ponyville to coach the junior races, Scootaloo realizes what she's best at doing.
516: Party on the Bayou
The map sends the ponies to Hollow Shades, where Pinkie Pie learns that her old party tricks don't seem to work with the locals.
517: Hot New Flare
When Celestia gets sunspots, Twilight is sent to learn more about the star, where she uncovers a startling secret.
518: Sweet Apple Showdown
An Apple-hating outlaw arrives in Ponyville, and Applejack has to set aside her differences with the Flim Flam Brothers if she wants to save her farm.
519: I Dream of Cutie
Frustrated that she still hasn't earned her cutie mark, Applebloom hangs up her crusader's cape.
520: Groovy Gala House
When Discord is called to be a host at the Grand Galloping Gala, he asks Fluttershy to help him.
521: The Changelings Are Due on Stirrup Street
When a panicked mare claims to have seen a changeling, all of Ponyville is thrown into a frenzy.
522: Library Blues
The map leads the ponies right in the middle of Ponyville, where Twilight realizes her old library once stood.
523: Sparkle Sparkle Supernova
With the star falling soon, Twilight tries to put her mind to other things, but can't seem to shake her fear.
524: S Marks the Spot
The map leads the ponies to one final location, Starswirl the Bearded's secret study.
525: The Falling Star - Part 1
When Sirius lands, Twilight must lead her kingdom in spite of Celestia's warnings.
526: The Falling Star - Part 2
In fear of losing her friends forever, Twilight recants her wings and crown.
The leaked episode list for season 5 leads me to believe that Scootaloo gets her cutie mark. Cutie Mark Magic - Part 1 Curious as to why the castle appeared, Twilight and her friends investigate a mysterious map that leads them to a strange town. 502: Cutie Mark Magic - Part 2 Fearing a trap, Twilight turns to Discord to help rescue her friends from Maredane. 503: The Crystal Caper The map sends the ponies to the Crystal Empire, where they must help the crystal ponies without letting Princess Cadance know. 504: Seed No Evil Babs Seed returns to Ponyville, but Applebloom soon notices her cousin slipping back into her old habits. 505: Over the Moon Princess Luna summons Twilight to help her interpret a vision about a falling star. 506: A Hoof-full of Apples The map sends the ponies to Appleloosa, where the townfolk are blaming the buffalo for a bad crop of apples. 507: Princess Pandemonium During a royal summit, the princesses find themselves entertaining some difficult dignitaries. 508: Fawnder over Yonder Fluttershy travels to White Tail Wood, where she meets a deer who is even more shy than she is. 509: The Centennial Celebration Twilight and her friends lead the festivities of of the 100th anniversary of the founding of Ponyville, but soon find themselves overwhelmed when everyony from all over Equestria comes to participate. 510: Star-Spangled Banter With the falling star drawing closer, Twilight has to persuade the Mayor to help her prepare. 511: Sweetie Spy Diamond Tiara recruits Sweetie Belle to help her eavesdrop on the other ponies competing in Ponyville Idol. 512: Diamond in the Dust Rarity is summoned to be a judge for a fashion show in Canterlot, but constantly finds herself being outshined. 513: Balder-Dash The map sends the ponies to Cloudsdale, where Rainbow Dash learns that Spitfire wants to quit the Wonderbolts. 514: Gem in the Dragon's Hands When the dragons of Equestria learn of a rare gem in the mountains, Spike begs Twilight to let him go find it. 515: Scoot Over When Shining Armor comes to Ponyville to coach the junior races, Scootaloo realizes what she's best at doing. 516: Party on the Bayou The map sends the ponies to Hollow Shades, where Pinkie Pie learns that her old party tricks don't seem to work with the locals. 517: Hot New Flare When Celestia gets sunspots, Twilight is sent to learn more about the star, where she uncovers a startling secret. 518: Sweet Apple Showdown An Apple-hating outlaw arrives in Ponyville, and Applejack has to set aside her differences with the Flim Flam Brothers if she wants to save her farm. 519: I Dream of Cutie Frustrated that she still hasn't earned her cutie mark, Applebloom hangs up her crusader's cape. 520: Groovy Gala House When Discord is called to be a host at the Grand Galloping Gala, he asks Fluttershy to help him. 521: The Changelings Are Due on Stirrup Street When a panicked mare claims to have seen a changeling, all of Ponyville is thrown into a frenzy. 522: Library Blues The map leads the ponies right in the middle of Ponyville, where Twilight realizes her old library once stood. 523: Sparkle Sparkle Supernova With the star falling soon, Twilight tries to put her mind to other things, but can't seem to shake her fear. 524: S Marks the Spot The map leads the ponies to one final location, Starswirl the Bearded's secret study. 525: The Falling Star - Part 1 When Sirius lands, Twilight must lead her kingdom in spite of Celestia's warnings. 526: The Falling Star - Part 2 In fear of losing her friends forever, Twilight recants her wings and crown.