i think that avengers post credit scene with thanos was a set-up for gaurdians of the galaxy. makes sense.
and i think the antman movie will be Pym, because of his tie ins with the avengers, that and he is creator of the avengers greatest villian ULTRON.
think about it, the movie would show pym create an ultra smart robot to be his assistant, ultron becomes ultra powerful, pym realizes that he alone cant stop ultron.... avengers 2. Go!
iron man 3, i think. the movie will start showing the alien ship of maklu 4, mandarin getting the tech off the ship and learning how to use it, which also could mean Fin Fang Foom appearance, but i doubt it.
Thor 2, i really hope they do Beta Ray Bill. starts off showing beta ray bills origin, then brb battling thor, he picks up Mjolnir odin brings them to asgard and then they battle again. beta ray wins. and then gets stormbreaker. and then Beta Ray and thor form an alliance to defeat an even more powerful enemy...most movies have multiple villians or enemies , in iron man 2 theres whiplash and hammer and he fights war machine. in thor there was frost giants, destroyer and loki.