Ok, so my thoughts are these, if Microsoft made an Xbox crossover fighting game, most likely the characters in the game would be: Master Chief, Marcus Fenix, Castle Crashers, Rush Skyes, Ryu Hayabusa and Dante from Dante's Inferno. Most likely the roster would have more characters from FPS games such as Makarov, Alex Mason, Captain Price and Soap MacTavish from the Call of Duty franchise. Well, what I can tell is that my reaction when I first heard that PlayStation was making a crossover fighting game early this year, and I was like excited and at the same time thinking that PlayStation is trying to copy Smash Bros with that game they made. Nintendo had a crossover game with Smash Bros which was released in 1999, then Melee was released in 2002, and six years later we had Brawl, and now with the Wii U another Smash Bros game is coming. If PSASBR becomes as successful as SSB, then they would make another one with MORE characters in the next two to three years or something like that.
Let's see what happens if Microsoft makes one sometime in the future.
God Bless and Play Hard Gamers!