Activision Blizzard is the result of a merger between two large companies, each with several studios, projects and different teams. So a merger between the two means some things are going to get shuffled around. Jobs will very likely be lost, and projects might get shifted.
Earlier we reported that Sierra's Crash and Spyro titles would be hauled up for publishing under the new label, leaving a question mark hanging around titles like Brutal Legend and Ghostbusters. Earlier today, Double Fine's Tim Schafer assured fans that "Brütal Legend is fine," and we've contacted Terminal Reality on the fate of Ghostbusters and will update with any response we receive.