Adam and much of the current cast have contracts until February 8th, which I imagine takes them all to closing and would cover an extension, should there be another.
Adam mentioned it when questioned about the chances of another extension at Chatterbox. He said that he and a number of others (he said a few names, but I can't remember which) are contracted until February 8th. Of course, that doesn't mean there will be one, but I guess they are making sure they won't have to recast if there is.