Marvel Anime (2010)

While there is little actual blood, violence is typical of modern-day super "hero" tales: fight first, talk later. Wolverine slaughters, the monsters are often gross, and while there are more violent anime on the market, many parents will object to the degree of violence in this-- common to X-Men movies.

Plenty of intense battle, really nasty monsters, horrendous mutations and scenes that would frighten younger ones.