Originally Posted by Mr. Dent
I'm thinking we'll get another after-credits scene involving Thanos, rather than him actually being in the film.
I don't think so.
Feige was very open about Thanos involvement, especially after Djimon Hounsou brought up that his character was an ally to him at the panel.
All past credit scenes were kept on the hush. So it wouldn't make sense for him to appear again there. Not to mention redundant.