The appointment of Bob Bakish this week as the CEO of Viacom could be the most shortlived appointment for a content CEO in modern times, as long as you don’t count the previous appointment of the interim CEO, Tom Dooley, who took the role just 6 weeks ago and almost immediately agreed to stand down. We are not even assuming that Bakish will fall out with the Redstone family despite its abrasive style of management. It’s just that it’s pretty clear that they are after merging Viacom with CBS, and unless they cannot reach agreement with CBS CEO Leslie Moonves, that could happen quite soon, and he would only agree if he was left in charge of both companies. Dooley…