entirely new and original characters, so I don't see what the problem is.
What sense would make that?
Besides, most MK characters have the same basic move set. They're ALL just variations of the same character, and that series has endured for decades.
Identical fighters like Ken, Ryu, and Akuma are pretty much mandatory for all Street Fighter games, the most successful fighting series of all time.
What I'm saying is that every xeno and every Predator is pretty much the same, in terms of being a character
. Ken and Ryu and Akuma can be seen like variants of the same moveset and fighting style, right, but their background and personalities are unique for each one of them.
All xenos and predator have pretty much the same background, personality, history, they ARE all the same, just variants.
Even the characters from that hypothetical Batman vs Superman video game based on 'Elseworlds' Superman and Batman, will have more differences.
The same I wouldn't support the idea of a "Dragon Ball Z vs Street Fighter" video game, because, well, how interesting can the roster be if saiyans account for like 85% of their popular characters and all of them have like a 90% same fighting style. But at least DBZ characters have their own and distinct personalities.
How about actually sharing some ideas instead of being a needless smartass?
My only idea is that no one would want that video game, very little appealing outside of the hardcore Alien and Predator fan.
That said, I have nothing else criticize further your idea, I think everyone has a right to have your own ideas