Over the course of Agents of S.H.I.E.L.D. we've seen some cameos from characters in the big MCU movies; for instance Nick Fury, Maria Hill, and Jasper Sitwell. And the main lead is Phil Coulson!
Well we may see Hawkeye come to Agents of S.H.I.E.L.D. How cool would that be? Ehem...let me try that again. How awesomely amazing would that be?! Stick a bow in his hand and he'll have Hydra agents dropping like flies.
Where do I get this? Clark Gregg (Phil Coulson) posted a photo from a panel of Secret Avengers #10 with Agent Coulson and Hawkeye in an intense face-off.
Now earlier it was said Avengers 2: Age of Ultron will tie into Agents of S.H.I.E.L.D. Hawkeye could be that tie in. He's rumored in Civil War but maybe he helps start something on [Agents of S.H.I.E.L.D.](series:722469) after the events of Avengers 2.
The other way he might be able to appear is because of Bobbi Morse a.k.a. Mockingbird.
In the comics Mockingbird and Hawkeye were romantically involved and eventually married for a short time. She's becoming one of the key players in Agents of S.H.I.E.L.D. and I'm sure we're not done seeing her kicking a couple Hydra rears. However, right now we're seeing her and Lance Hunter going after each other, but there can always be a change right?
Agents of S.H.I.E.L.D. will return March 3 after Agent Carter has finished it's amazing run.