It is funny that I see this topic, me and my brother used to think this all the time years ago.One of the main things I would want to see is a Pokemon roller coaster with Rayquaza, as for other things, a Metroid based lazer tag with the bounty hunters and space pirates, a Kid Icarus power of Flight thing (sorta like Soarin from Disney World) and virtual Pokemon battling. And just a random thought, some Mario type parkour would be awesome (of course with some sort of harness).