Could be possible. It's doubtful that the xenomorphs and predators work together. 
Of course miracles happens.
Of course miracles happens.
Oh no I mean the predators might run into the arachnids and take out a bunch of them. And maybe the xenomorphs find the collectors? Terminator might run into the zerg etc. So maybe Samus and EDI will only find the aftermath 
Everything is possible.
Everything is possible.I like a real chaotic situation. Let the game start.