Max has publicly stated that he'd like to have Hulkenberg in the RB next year. Presumably because Hulk would be far more likely to take points off Bottas and Hamilton when they have iffy races, and also is better able to give useful feedback to develop the car. Personally I'd love to see it.
A bit of a shame that Gio is being retained by Alfa. Seems to be a bit of a wasted seat. Kimi's beat him 6-3 in races they've both finished this year, and they points difference mostly comes from Gio finishing 9th/10th in races of high attrition where Kimi DNF'd. I was really hoping to see Schumacher in the Alfa, but I guess his debut is going to be in that dreadful Haas instead.