Source: comicvine.gamespot.com

7. USAgent

Out-of-left-field pick, I know, but hear me out.

Clearly someone needs to be Captain America after Chris Evans leaves, and while I'll get to the leading candidate a bit later on in this list, here's another way they could take it. John Walker started off as the ultra-patriotic Super-Patriot, and he clashed with Captain America on a couple of occasions.

When Cap retired from his identity due to government pressure, and took the identity of The Captain, Walker was tapped to pick up the shield as the new Captain America. When he realized that the job was meant for Steve Rogers, he took on a whole new identity, that of the USAgent. I'm not suggesting that the MCU version of Walker should become the new Captain America, but an Avengers squad led by a harsher USAgent with something to live up to would be great.

USAgent is a solid choice to usher in a new MCU era, an era that gives some lesser-known heroes a chance.