Nothing melts the lingering cold of winter (Mother Nature needs to check her calendar...) like a promising summer movie lineup. First from the animation department, Pixar's long-awaited (and already acclaimed) Cars and the computer-modulated A Scanner Darkly from Warner Independent. Of course, you can't go wrong with good sequels: X-Men 3 (beast!) and Pirates of the Caribbean 2 (arrrr!). And for good measure, a couple late bloomers waiting for the frenzy of fall: an ethereal book adaptation of The Fountain and a delightfully silly dance number for Happy Feet.