The show comes back September 27th. We already know that featured players John Milhiser, Noel Wells and Brooks Wheelan were cut at the end of last season (they never really found their place), and Nasim Pedrad left of her own volition for her role in FOX's Mulaney this Fall (it shoots on the West coast, so flying back and forth every week would be impractical). No word on anyone else leaving, so it's assumed that everyone else is staying. Lorne Michaels told CNN that the show is still rebuilding, so there will probably be new featured players added, either at the beginning of the season or in midseason. He also told the New York Times that yes, there will be a tribute for Don Pardo, but he didn't say when, exactly, that would happen. I would imagine there will at least be something up front in the season premiere. There's also a three-hour 40th Anniversary primetime special on February 15th, so I'm sure there will be a significant retrospective on Don's career and his history with the show then, as well. As for who will succeed him (he'll never be replaced), that hasn't been announced yet.