So i had an idea for the mean 3 to be main characters for an rpg maker like game. But i have no motivation so here's my idea.
As they are in stone, the spirit of the real Grogar makes them a deal(for motivation unknown). He can tranport their minds to either their A: past, at Season 4 finale. Tirek wondering about, a little younger cozy maybe in a orphanage, Chrysalis with her army. B: In the present of season 9, where the at the fake Grogar's base after frenemies were they got the Bell, no need to get the book to know how it works now. C: In the future of the season 9 finale, where they'll figured out what to do in a less familiar time, maybe manipulate a naive luster dawn who wants to reform the villains.
Each time is branching path. The mean 3 three will use their teamwork and knowledge to take the throne and win. A is easy, B is medium and C is hard difficulty. There would be a twist each time they win a path, and the player can play another path without the mean 3 remembering the others.
After the 3 path completed they remember everything as they are free from stone and fight an all-powerfull Grogar because he used them.
Now the ending would be them realising they are friends but still wants to be villains together. They walk away in the sunset of the far future (maybe G5), and laugh at their eventual plan for revenge...
I know this is years after this post was made, but i had to take it out of my mind.