I don’t think Batman could lift Thor’s hammer, Mjolnir. Sure, he’s got the willpower, intellect, and a strong sense of justice, but he’s also pretty ruthless and operates in moral grey areas. Mjolnir’s worthiness seems to favor pure-hearted, selfless heroes except when Hera took it lol. Batman’s methods, which often involve fear and intimidation, should disqualify him. Plus, superpowers are a must, Batman’s reliance on gadgets over inherent abilities should be a factor. So, as much as I love Batman, I don’t see him being worthy of Mjolnir.

Paul Bettany's Vision lifts Mjolnir in Avengers Age of Ultron