I suspect that in the future, every major studio will have their own streaming service.
There's Disney+ from Disney, NBC/Universal will have one, Warner Bros/HBO will have one, Paramount/CBS will have one, they all announced it already and I'm pretty sure that all of them have enough talent working for them and a back catalogue of exclusives that they'll survive..
I'm not sure about Sony, they're pretty stupid and they don't have as much money.
Maybe they will merge with Netflix because they're both struggling right now, if they had an exclusive Spider-Man movie on Netflix, people would buy the subscription just for that. We'll see.