
Captain America: Chop Chop (Undead Defender) Self explanatory using a shield as a weapon, honorable soldier and around since the ancient Arkeyans, one could make an argument he was the First Skylander (Eh? Eh? Get what I just did there? Hahaha)
Iron Man: Drobot (Master Blaster) Smartest of the dragons...built his own armor...flying around with boosters firing off lasers...yeah. Hahaha.
Hulk: Pop Fizz (Best of the Beast) Reckless experiments that turn him into this rage monster? Yeah I had a good laugh on this one.
Thor: Crusher (the path that focuses on the hammer

Bonus!
Black Widow: Stealth Elf
Hawkeye: Flameslinger
Again this is just my entertaining little thought that I wondered if anyone else thought the same so I know I'm not just being a comic nut
