50 Million isn't bad. Dragon's in it for the long run, and no doubt kids will flock to it on weekdays once summer vacation hits. Kung Fu Panda 2 did around the same amount, and there's still going to be a third film (at least). Personally, I just wish CN cleared up a spot on its schedule to actually show the cartoon spinoff and use that as a promotion.
22 Jump Street at least looks like a solid comedy. It had a strong following from the first film, and no doubt that followed to this box office. But it's not a family film. 50 on opening weekend is a pretty good showing, plus Dragon's already has a third on in the works.