Crisis On Infinite Earths, Part 1: What Does The Ending Really Mean?

5. Titans Takes Place On Earth-9

'Crisis On Infinite Earths, Part One' had an Easter Egg-heavy intro that made all of our DC-loving hearts happy. Among those Easter Eggs were nods to Batman 1989, the Arrowverse's own Crisis On Earth-X and the classic Batman '66 TV series, but perhaps the most shocking of them all was the ever-so-brief clip of Titans' Jason Todd and Hank Hall.

Not only were the shots of Curran Walters' Robin and Alan Ritchson's Hawk pleasant surprises, they confirmed that DC Universe's Titans is set on Earth-9 and that, yes, it is part of the overall Arrowverse.

Who would've thought it?!