The Skylavengers 2: Age of Adagio

It is a 2015 film.
Cast
Spyro - Iron Man
Gill Grunt - Thor
Trigger Happy - Captain America
Eruptor/Tree Rex - Hulk
Pop Fizz - Hawkeye
Jet-Vac - Nick Fury
Stealth Elf - Black Widow
Sonic Boom - Scarlet Witch
Terrafin - Quicksilver
Adagio Dazzle - Ultron