Not a whole lot to go on right now, but German site HDTV Praxis has it that both Paramount and Universal will now make the obvious choice and publish their films on Blu-ray. Notably, this follows hints seen in certain Circuit City databases as well as word that we've received noting that both studios would indeed make things easy on everyone and simply support the one format still standing. Interestingly, DreamWorks isn't mentioned in the linked article per se, but we've all ideas it'll be following suit shortly.
Update: Universal's president Craig Kornblau had this to say: "While Universal values the close partnership we have shared with Toshiba, it is time to turn our focus to releasing new and catalog titles on Blu-ray."