Hollywood's best reactions to Ben Affleck being cast as Batman

"Man of Steel" director Zack Snyder took the stage at the San Diego Comic-Con in July and revealed the logo for a new Superman film which will include Batman - the first time the two superheroes will be united on the big screen.

That rumor you heard of *surprise* Ben Affleck being cast as the new Batman for 2015's Man of Steel sequel? It's true.

Thursday evening's near Internet meltdown - to be remembered as "Twitter's Dark Night" - after Warner Bros. announced that the 41-year-old actor-director will star as Bruce Wayne opposite Henry Cavill's Superman in the follow-up received a a range of reactions from Hollywood's elite. We highlight a few - in addition to other notable tweets, below.