Originally Posted by Savage
I hope so. That'd be awesome. It would make more sense than anybody else running into him. I'm reaching for a connection with the other characters, here but Thanos may very well show up in some form in every movie from here on. Teasing his appearance in The Avengers 2.
I think he may be the main villain for the sequel of TA. Imho, if he were going to be used as the main villain for the third film, then I don't think that Marvel would have shown him at the end of the film and only continue to tease him on even past the sequel. Given that he's now on everyone's radar, if they were to still save him for the third film, then the second villain could potentially feel the backlash of that since there's a chance that a lot of people would just be in the "okay, let's get this part out of the way so that we can see the next phase with Thanos".