In a recent interview, exec producer Ben Cousins explained DICE's plans to expand the current closed beta of Battlefield Heroes to be large enough so that "any hardcore gamer who wants a key, will be able to get one". Then after this mass expansion they will quietly release it fully. It's an odd way to release a game, but people are always eager to try closed betas, so maybe it's to build a solid playerbase prior to the game's launch?

Via Joystiq