Image taken from the FFG home page
Let's look at Captain America out of the Justice aspect.  Overall, he's fantastic in basically ANY aspect, but frequently no matter the aspect I'm in, I find myself thwarting with Captain America quite frequently.  With a 2 THW and the ability to ready himself once a turn, he's going to be able to get a lot of work done all over the game.  His hero cards give him a lot of ways to influence the game, so really, you can pick and choose what you want to focus on.  He also has multiple cards that stay on the board and generate resources, which is incredibly valuable.  Whew, what a great hero.

Okay, let's look at the deck I've been using with him:
Captain America
Packs: From Core Set to Ms. Marvel

Upgrades
2x Heroic Intuition (Core Set)
1x Captain America's Helmet (Captain America)
1x Captain America's Shield (Captain America)
2x Super-Soldier Serum (Captain America)
1x Followed (Captain America)
1x Endurance (Ms. Marvel)

Events
3x For Justice! (Core Set)
1x Great Responsibility (Core Set)
2x Fearless Determination (Captain America)
3x Heroic Strike (Captain America)
2x Shield Block (Captain America)
2x Shield Toss (Captain America)
3x Concussive Blow (Ms. Marvel)

Supports
1x Interrogation Room (Core Set)
3x Surveillance Team (Core Set)
1x Avengers Mansion (Core Set)
1x Helicarrier (Core Set)
1x Steve's Apartment (Captain America)

Resources
2x The Power of Justice (Core Set)
1x Energy (Core Set)
1x Genius (Core Set)
1x Strength (Core Set)

Allies
1x Daredevil (Core Set)
1x Jessica Jones (Core Set)
1x Mockingbird (Core Set)
1x Agent 13 (Captain America)

It's done quite well, but I admit it still needs some changes.  I find that I don't value drawing many of the cards, including Great Responsibility, Interrogation Room, and Surveillance Team.  Although, admittedly, Great Responsibility has proven to be helpful to me with the Wrecking Crew.

As I expected, he's really had no problem dealing with schemes, and gets plenty of opportunities to put some damage on the table, as well, which is nice.

He's been great into the Wrecking Crew, and the first Goblin scenario, so far.

Anyway, that's where I currently stand with this- anyone tried him out, and if so, how has he fared?