New Hulk Has Six-Picture Deal With Marvel!

While in an interview discussing "The Avnegers", actor Mark Ruffalo was asked about how many films Marvel had signed him on for to play Dr Bruce Banner/The Incredible Hulk for. Ruffalo said that he was signed on for a maximum of six films.
I assume that the first three will be "The Avengers" trilogy and the others could possibly be his own "HULK" trilogy or even one of them and the other two are possible cameos in other Marvel Cinematic Universe (MCU) films.