I'm still undecided about it. We were promised some huge shake ups in writing, but the trailer seems to give more of the same i.e. Jack goes against an enemy he once knew who holds some secret weapon to cause mass destruction. Don't get me wrong I'll still watch it, the action looks great, but I'll go in with low expectations this time round. I mean, bringing a character back from the dead just screams out of lazy writing. I'd much rather prefer a small-scale threat. Season 1 is regarded as one of the best, as it shows you don't need a 'WMD of the day' to create drama and suspense.