I think your comments about the power are largely spot on - and bigger players can make a move for their own streaming services, but smaller ones will need to band together (not necessarily via an all-in-one subscription service like Netflix, but via some sort of content platform/store/whatever).

That said, I think that the curation aspect is something that studios aren't overly concerned about - they just hate that a direct competitor is stealing their profit and making their own content. If Netflix wasn't being as aggressive (or wasn't being so damn profitable; or wasn't negotiating prices with the studios), I don't think that the content creators would be trying to run away so quickly.

I hope that open protocols win out, that's the best solution here for everyone (and would be the ideal "major marketplace" in my parent comment). That said, it may just wind up being an organisation owned by a consortium/cartel of studios (or even some other third party) that's contractually obligated to "fairness".