The fledgling sitcom Up All Night could be one of the big new winners of the Fall TV Season.  Some role reversal puts Christina Applegate as the outlandish, working mom who is teamed up with Will Arnett (Arrested Development) as her stay at home dad/man.   The show has strong TV lineage  — created by Emily Spivey (Parks & Recreation) and Executive Produced by Lorne Michaels.  A major publicity push should get the show lots of buzz and a good first look then its up to the team to deliver.  Could be big?  Like all comedy, it’s all about the funny stuff.  With a four and a half minute promotion like this one, you get a good feel for some of the best stuff the pilot has to offer.