Well we know that he will develop a bit of a friendship with Dr Strange in Infinity War, at least according to Tom and Benedict and the Russo brothers. Don't know if everyone saw this but there was a set photo of Spider-man's suit from Civil War/Homecoming with Dr Strange's cape.
So naturally we might assume that he will team up with Strange in the sequel. Maybe, maybe not. They might want to experiment with another hero in the sequel. If we're getting Scorpion then I'd rather they save Strange for a movie with Mysterio. I don't mean I want to see Dr Strange fight Mysterio, I mean I want to see Strange just help Peter out. Like if Peter encounter's Mysterio for the first time and he get's away, first thing Peter's going to think is "That guy is using magic, maybe Strange can give me some advice with this guy". Although I still want Peter to figure out for himself that Mysterio is using illusions. That might be tricky though since Strange will most likely see through the illusions. Hmm...
I'd really like to see Cap and Spidey together, so maybe that'll be might pick for the sequel.