Originally Posted by CoulsonFan
Black Widow and Hawkeye have no characterization in these films and I don't think the time they get in Avengers will be sufficient to warm audiences up to an idea of a spinoff. They can put them in the SHIELD movie and then feel things out from there.
They won't just be making Captain America, Thor, and Iron Man movies, they're also launching characters like Dr. Strange and Black Panther, plus the intergalactic team movie(s.) Strange, Panther, Ant-Man, and even a character like Iron Fist all have the potential to become film trilogies which also tie into the crossovers.
Their goal is probably to emulate the Avengers comics and build up a roster of characters who can feature in an Avengers movie once they've done their series with the original team of Thor, Iron Man, Captain America. They can't have Scarlet Witch and Quicksilver, but Hawkeye and Black Widow were part of that "second generation" of Avengers in the comics and they're working to establish them now.
they'd be daft to not make films that could be cheap using scarlett johansson and jeremy renner as leads. renner just got the bourne role, scarjo is one of the most famous people in the world. they are draws and playing characters people have seen before and giving those characters time to really establish themselves could mean big bucks for little spent. scarlett is on a 9 film deal if i remember correctly.