This swings far far away from Avengers Assemble to the point of Marvel Super Hero Squad. There's a lot of kid humor and it's too child friendly. 'Frost Fight' offers nothing to an older audience. Teen fans will hate it, adult fans will immediately notice how cheaply this was made, and anyone under the age of 10 will have a lot of fun with it.
It presents the Carol Danver's version of Captain Marvel which I was hopeful about, but I found myself missing Hawkeye & Black Widow. Her look is kind of dated and is out-of-place with the other artwork. Basically a completely different art-style.
There's a trainee kid who goes by 'Reptil' that I found incredibly annoying. His power is having pterodactyl wings. It's a throw-away character that you might expect to be killed off (for sake of showing death) without erasing a major character.
Steve Rodgers/Captain America and Tony Stark/Iron Man have different voice actors. It sounds close, but it's a little weird. I personally have a pet-peeve about Marvel changing voice actors just for the films.
Santa Claus & Mrs. Claus make their way into the story and it's the Kiss Meets Santa joke from Family Guy. Yeah - Somebody threw out a movie really fast and whoever did it should be fired. Grossly incompetent choices were made about this release.