Originally Posted by BatsDC
Not just so he can run around in purple. That doesn't even have to happen. But to have him seperate from SHIELD, off doing his own thing as a badass superhero.
He could become seperate for other reasons - Black Widow being a double agent (later triple) and not trusting them any longer, or something of the sort.
Clint already caused a huge loss of SHIELD agents, albeit because Loki was controlling him and not through his own bad judgment. And he is already called Hawkeye; Natasha called him that during the final battle ("Hawkeye! A little help!") and Selvig called him "The Hawk". Introducing Clint's wife from the comics just to have her killed for plot purposes would be a waste. Bobbi would make a great addition to the team, or to SHIELD, whether or not the writers decided to pair her with Clint romantically.
At the end of The Avengers, Clint and Natasha went off on their own, just as the other four Avengers did. Fury told the WSC that he had no idea where they were and wasn't tracking them. One can assume that they are separating from SHIELD at least for a while due to the events in the movie and possibly mistrust of Fury himself.