Well.... it acctually got me impressed, it is like doing a Namco X Capcom anime. Why? some may ask. Quite simple, this history has its originarity (although the Digimon feeling, look at Jessica, SHE IS A CHARACTER FROM DIGIMON artwork), yeah, it has it originarity, the thing is that: Some teams in original's Marvel SPOILERS 1: some teams never meet each other, like Guardians of Galaxy never crossed paths with the Avengers (not from what I read), they never came across Doormamu (didn't read this one too). Spoilers 2: They even made a Symbiote original's arc (this arc felt like Evil Ryu in Namco X Capcom,,who played it may understand what I'm saying). They even put DeadPool to work!!!!

Spoilers END.
OF COURSE IT IS DIFFERENT FROM THE ORIGINAL MARVEL STORY. But whatever, it is not Saint Seiya Omega at least (Naruto is Naruto, Mecha is Mecha, Power Ranger is Power Ranger, but SSO IS NOT SAINT SEIYA!)
It is supposed to be a kid show, but it is good the way it is (fun to watch),
this is mah opinion, mah, warui if I had bad manners here.

Story: 09/10. Like I said, it has it own originality, even copying Digimon and stuff.

Art: 07/10. It has some fails in the art, soooo, good although.

Sound: 10/10. Nothing to complain here.

Character: 07/10. Hulk's behavior is a bit different here, and the children are... well, their evolution in the story isn't that to be expected in an anime.

Enjoyment: 08/10. The last episodes (after RedSkull's arc) are better.

Overall: 08/10. Not that bad like the fans say, I am a fan that likes anything related to what I find fun, be a HQ, Manga, Anime, Game, whatever, if I like the brand, I will enjoy it, but SSO... I don't know how people can like that.