On Thursday, Pixar announced that it had signed Mark Ruffalo for a major role in its next feature film. According to Variety, the Marvel star will voice Nero in Pixar’s upcoming animated feature Gatto. The film’s logline states that “after years of maneuvering the canal-ridden, superstitious city of Venice, Italy, Nero begins to question whether he’s lived the right lives.” Still from the teaser trailer for Gatto – Pixar, YouTube READ: Spencer P…