Here is a video released by Marvel which shows a compilation of various Marvel movies. More like a build up for Avengers: Age of Ultron. Among these clips, the only movie I watched is Guardians of the Galaxy.
I have seen many videos like this where they compile various movies, sometimes with a really cool background music, but what surprised me was the ending.
Yes, the great Thanos is finally revealed. You can either skip to 5:14 or watch the whole thing, because the whole video is like a build up for this one scene. According to Robert Downey Jr., he is the best villain in Avengers so far.
So, I guess we can finally move on from Loki and embrace the new chaos that earth is going to face.