Now that he's not just an urban legend or a headline on the Weekly World News, I'm sure there has to be some evil organizations out there taking the Hulk into account and developing some anti-Hulk weapons as a back up for whatever plans they got. Government, maybe as a safeguard. It seems like S.H.I.E.L.D. is vouching for him/Banner so he's not a fugitive anymore post-Avengers. He had a pretty sweet set-up with that lab at the end of Iron Man 3.