Final trailer:
I've got a feeling one of the main characters will die this season. If it ends up being the final season they could possibly kill off Eleven but I doubt they'd kill off one of the younger kids. Steve would be the most likely candidate. It just seems like it's about that time in a shows evolution for a big character to die.
Some Strange-er Things?
Yeah it was really obvious, the only reason they didn't show the character at the end is probably because the actor wants to get into shape for the next season. 3 months in a Russian prison the weight would have fallen off I imagine. Glad they didn't get Mike's mother to hook up with Billy though, as I think it would have taken away the slight sympathy you have for her as a long-standing/suffering bored housewife. Good decision from the writers I think.