Of the “official” Avengers characters, the two that have been more or less underdeveloped is Bruce Banner/Hulk, and Clint Barton/Hawkeye. While both have been promised (and teased) more screentime in Age of Ultron, it’s been unclear whether either character will appear in any of the Phase 3 films. Well in Jeremy Renner is to be believed, he may be back soon.
The actor took to his WhoSay page and posted the image below, along with the text, “Tues morn. I find myself in costume again. I just can’t tell you why. And it still fits!”
It’s unclear why the secrecy is heavy in his statement. For all we know he could be doing reshoots for Age of Ultron. Or…he could be shooting a cameo for the second half of Agents of Shield…or, he could be doing something else entirely! Who knows?