My suspicion is that while we may eventually get to continue portions of quests that extend from Act 1 into a portion of Act 2 (but only a portion), for now and into the foreseeable future; gamers will be sampling the current content as it is improved or enhanced and then be spoon fed each additional class and/or race that is intended to be part of the overall game. This will save most latter portions of the game for the general release!