Obviously I do not own Rise of The Guardians, because then I think I might have better things to do with my time than this...
Jack's winter and Bunny's spring and they shouldn't work, but somehow they do. Sure, it was a little awkward in the beginning, and there was some not-so-great history between them (the Blizzard of '68, anyone?), but that's all in the past now. And every time the Guardians get together (they've been doing that a lot more since, well, since Jack joined them), it doesn't escape anyone's notice that Bunny and Jack always sit next to each other and they always end up on the floor, engaged in some sort of silly wrestling match. And if Jack stares at Bunny for a moment too long, and if Bunny fixes Jack's hair a little more than he probably should, well, no one's going to comment. Because, now, Bunny's a tad calmer and Jack's a bit more adult, and everyone's a lot happier. And who can say anything about that?