If Microsoft made a game like Smash Bros, what characters/levels would be included?

[MDT500]

I mostly play PlayStation consoles, so I don't know many characters of Xbox, but. Master chief ( duh) dude from GoW, Banjo and kazoomie ( sorry for misspelling) Fable one character, Perfect Dark main character, Quantum Break main character, Steve from Mine Craft, Captain Price from CoD, Main character from Allen Wake, someone from Left 4 Dead. Main character from SunSet overdrive, and I'd what else :)