Movie time on Avengers

Managed to catch a show for the Avengers. Not a bad show. There are some hilarous moments with the Hulk. Was surprised that the theater was not full. Ok the ticket was a sponsor by my uncle's company but you mean there is not much people in the company interested in the Avengers? I am glad I got the chance to watch it in theater. Since it is a Marvel production, they have the usual end of the show scene where it reveals that the next villain or villains will be the Kree. These guys in the comics will tangle with Silver Surfer and Fantasic Four. So does Marvel think that Avengers will always be best to talk on alien invasions?