Two worlds collide

When Vilgax's team/family got sucked in to a portal along with Ben's team he wanted to rule over, not just Ben 10' timeline earth but Earth 161 as well. Until he found himself a competition known as Thanos. Who wants to start a war with Vilgax on Earth, Can Team Ben and the Avengers stop a war with Vilgax and Thanos by defeating them and try to get Vilgax and his team to go back to their own world before the Earth becomes a battle ground for Thanos' team and Vilgax's team.

OCs, Avengers, Transformers (Autobots only) and Ben 10

Note: They are pairings that you may not like. If you don't like it don't read it or if you want to read it go ahead but please keep your opinions to yourself. I do not want to have ship wars in the comments.