Yes, I know the topic at hand has been done to death, but this time it's a little different. I want to see what you guys think would be good ideas for a game like this. Ideas such as: the plot, which characters would be featured, the gameplay, whether or not Mario and Sonic will be rivals, etc. So watchathink?
My idea for a plot involved Eggman accidently using the Chaos Emeralds to warp to the Mushroon Kingdom and meet Bowser. They decide to join forces and help one aother get rid of their enemies. Sonic and the other Sonic characters end up chasing Eggman into the Mushroom Kingdom and getting separated. From here, Sonic and Tails have a fight with Bowser, who tells him that Mario and Luigi are the real enemy. Amy Rose ends up at the castle and meets Peach while Knuckles lands in the middle of Nowhere with the Master Emerald, which Wario tries to steal. Eventually Sonic and Mario realize who the real villains are and go after Eggman and Bowser back into Sonic's world (which may or may not be Mobius, accordig to the games' canon) and the second half of the game picks up from there. Leading all the way to a final battle in the pathway between the dimentions. How's it sound? You may post your own ideas if you wish.