WELL 1.a fighting game 2. 3D 3. with almost every character in the games in it with their transformations, and all of last bosses 4.metal sonic ,mecha sonic and Neo Metal Sonic should be in it. 5. fighting places should be big and every character that can run fast can runaway from me (Mwhaaahahah).
6. for story it will be about super villians united (well only villians that are truly evil) ....... ( and those who are not big or huge )
7. there will be a mission mode with ranks 1.beginner 2. intermediate 3. advanced 4.emerald ( in emerald rank there's 7 missions for seven emeralds )
8. transformations can be unlocked by collecting emeralds but only one will be unlocked and then emerald must be obtained in missions
9.and a customize setting for customizing characters, with the items from story and missions
10. after clearing story and missions they can be replayed with any character
11. there will a fighting place and in a fight there can be 4 players (they can be COM ) and there will be different fighting mode like running and fighing and.....