I think it goes without saying that in this fantasy scenario if Sony ponied up for budget/publishing it would be an exclusive deal (or, like SFV, PS5 + PC). SH also doesn't require a massive budget if done right. Like I said earlier, simply having the 'cult-classic' pedigree of the property console exclusive, even timed-console exclusive, on a new generation system could have long term benefits for the platform. Sony benefits because it's more ammunition to push PS5s. Konami benefits because they own the IP.
Also, Toyama isn't an independent contractor. He's en employee of SIE. If they say "we want you to reboot Silent Hill because we just spent money borrowing it from Konami", what choice would he have? He's had relative freedom to do projects he wants to do at Japan Studio. Could you see him just leaving that because he doesn't want to do what his employer asks? You (not YOU, you... figurative you :p) never know how these things work. Could be a respectful "lead THIS project for us and we'll give you free reign on your next project". Hell, I wouldn't be surprised if that's how certain things have worked in the past (i.e. could Barlog, just as one example, have been told "come back, make GoW for us, and you get carte blanche after that"? Maybe, maybe not- but if not that one example I could see other situations materializing like that).
All of this is extremely speculative, though. In the end I suspect it's not going to be anything nearly this exciting or dramatic- if this is anything at all, haha.
