Though what exactly is going to happen with each character in season 4 is still a bit ambiguous, reports are that all of the 15 main cast members are returning with Chord Overstreet in talks to become a series regular.
Deadline is reporting the news:
…Ryan Murphy extended an open invitation to all 15 regulars to return for Season 4. It appears that virtually all accepted it and are set to come back, though not everyone will be in every episode.
Lea Michele and Cory Monteith are slated to appear in most (if not all) episodes of season 4.
What are your thoughts about Sam sticking around full time for season 4?