Yeah. Ok. Sure Universal. You're totally not going to do anything else with one of your more profitable franchies. I totally believe you won't be making any spin-offs or doing any reboots. Yeah. Sure. Ok. Wink wink.
Who knows, maybe Comcast will feel like they have no choice but chase some more M&A options like buying MGM and/or Sony Pictures so they can have the Spider-Man rights?
Are they intending to have live-action Spider-Man on its own again and not work with Marvel Studios? Because we saw how well that was received by people when Sony and Marvel Studios originally said they weren't working together on a third film. And we'll see how Morbius and Venom 2 do. Otherwise, good luck if you want to reboot and do your own thing again.
... Into The Spider-Verse crew and films though would probably work out for them if they just let them be and not interfered. But that's besides the point.
Buying Sony exclusively to get Spider-Man film rights isn't suddenly going to solve their problems and make everything better. Not when right now the mainline live-action films are too tied to the MCU from an audience perspective, and we still don't know in the long term how Sony's Live Action Marvel Universe of films will perform. And Live-Action superheroes always bring in more money than animated superheroes (fair or not). If the Sony AU works, then Sony doesn't have a reason to sell off it's movie division. If it fails, then all you've got is a franchise heavily dependent on working with another company.
No, Universal/Comcast is not going to abandon their current franchises. F&F will continue in some shape and form. And as for Universal, I think they're long term plan is going to be partnerships with other media companies like the Mario movie with Nintendo, while they figure out how to build up their current assests/make new long running franchises. Which is what ViacomCBS/Paramount is doing anyway, and they're on a slightly better footing compared to Universal (although obviously a step below Disney and Warners). They'll be fine.