MOVIES Top exec Stacey Snider's decision to move from Universal to become co-chairman and CEO of DreamWorks announced Feb. 26 ended a week of speculation in Hollywood. But it raised a host of new questions, primarily: Who will replace the woman behind hits like The 40 Year-Old Virgin and A Beautiful Mind (and misses like The Producers)? Universal Studios president Ron Meyer declined to comment, but the short list is said to include several folks within the NBC Universal family. Also, what does this mean for in-flux studio Paramount, which recently outbid Universal to purchase DreamWorks? Snider's pending reunion with DreamWorks cofounder Steven Spielberg, her longtime ally and business partner, adds some welcome warm fuzziness to Paramount's tense, ongoing overhaul. In the meantime, the company which boasts M:I 3 in 2006, but not a lot else seems to be collecting more heavy-hitting execs than high-profile projects.