With Captain Marvel fighting shape-shifting Skrulls in her soon-to-be movie.....

[Fluffernutter]

Which Avenger/SHIELD agent is going to be revealed to have been a Skrull all along?

 

[Turtlejuice]

Ward

 

[El_Dyablo619]

Which Avenger/SHIELD agent is going to be revealed to have been a Skrull all along?

 

[emceeGRENDEL]

Coulson.

Tahiti was a farce.

 

[KnightTemplar]

Duh. Obviously it was Fury

 

[Eazy123]

My bet's on that one guy

Sergeant Potato or something

 

[Fluffernutter]

Less likely:

Captain America - With the negative press of Steve Rogers being a Hydra spy, I'd say they would not touch this one.

Iron Man - I assume RDJ would be phased out one Phase 3 ends. Since he is the main character of the first MCU movie, I doubt he will be a Skrull.

Thor - I just don't see it.

Hulk - He's Hulk, plain and simple.

Dr. Strange - Too new of a charcater to pull a M. Night Shymalan type of switcheroo

Spider-Man - See above


More Likely:

Black Widow - After all, she had that "change your face mesh" in Winter Soldier. Maybe she is a shape-shifter after all.

Hawkeye - The guy uses a bow and arrow in the middle of a alien war and survives. Wouldn't doubt if he is a Skrull and thus why he has survived for so long.

Rhodie - How did he survive that fall in Civil War? Dude's an alien

Maria Hill - That's why she has been able to work up the ladder of SHIELD. She's an alien.

Drax - Sure, why not?

 

[HunterAcosta]

I agree that Widow would be a likely candidate. In the Netflix MCU, Id say Elektra. Why? Dunno. Just seems like it would cool.

 

[Magooglie]

Everybody that worked for Shield, including all the Hydra guys.