I'd say action because every other thing just can't work in a ( be honest) cheesy versus monster film.
The avp franchise will never get the best actors, best storyline. The horror is also long gone because of over familiarity, which basically leaves the action sequences.
Freddy vs Jason wasn't horror at all, i call it a cheesy B entertainment action flick, i believe or think avp is just the same.
All superhero or monster movies are a bit cheesy to be honest. Superman,spiderman,batman c'mon it's never highly rated, it's all about entertainment.