Jeremy Renner previously let it be known there would be new good guys in The Avengers 2, and now possible new details emerge.
According to Bad Ass Digest, at the end of The Avengers 2, Captain America will assemble a new team of Avengers, which also includes some of the familiar characters, leading into the Phase 3 movies.
One of the new characters that is stated to be present in all the drafts for The Avengers 2 is Ms. Marvel Carol Danvers.
It's stated the appearance of the new Avengers is basically a cameo at the end of the movie, and it's also being stated that Marvel might be on the fence regarding Ms. Marvel in The Avengers 2.
The reason cited for Marvel possibly not wanting to use Ms. Marvel in The Avengers 2 is because they aren't sure if they want to introduce the character in this way, as it is said she is on the team in The Avengers 3.
The good news regarding Ms. Marvel is that Marvel Studios president and producer Kevin Feige recently stated that fan interest also plays a part in their decisions. Ms. Marvel, as well as Black Panther, are brought up by fans more than even The Avengers 3 or Iron Man 4 which "makes a difference," said Feige, and "that’s something we have to pay attention to."
Eder Sher has been rumored for the role of Ms. Marvel, with Katee Sackhoff a fan-favorite choice and Yvonne Strahovski at one time said to be up for the role.