Well speaking of Nier, there is Platinum and maybe they could, but I can't think of too many other Japanese devs who'd be interested in that over their own JRPG IP. Square-Enix are busy with FFXVI and Forespoken; maybe the DQ team would be up for it but they're also probably busy with the next DQ game. Sega/Atlus have their plates full with PSO, Persona, SMT. Capcom have their MH series to focus on not to mention several other games like RE Village and certainly SFVI, don't know what team(s) they'd have to spare. And Koei-Tecmo aren't really too versed with JRPGs as a genre or adapting JRPG works as far as I know.
With Sony's focus seemingly more on Western-style 1P games and having Western studios handle IP built from Japanese studios initially, Blue Point is probably a good bet provided they aren't too busy, which I guess is going to depend on how true those MGS Remake rumors are. But I also agree that it comes to a matter of if they'd want to which is why they'd probably want to do a simple remaster of a re-release and see how that's received and how it fits in with the rest of their 1P focus before going any further.
Personally I want them to bring back Parappa and Tomba!, but that's another discussion.