Hmmm...I guess if we broke this fight down to simple math, it would average out to be 100 aliens and 100 predators per each member of team Thanos. Yeah they could do it..but it wouldn't be easy. The Pred's are damb smart and have all types of sneaky tech. They'd quickly realize the level of power of the opponents they were facing, and would resort to a more tech based attack. I could see them using some sort of nuclear type device(As seen in Aliens Vs Predator) and taking out a few peeps from Team Thanos. I'd still give this battle to Team Thanos though, after a long drawn out battle..with a few casualities...on Team Thanos's side (Probably Magneto, Sersi, Vision, and Dr Doom..)