I'd take a Naughty Dog-produced Jak 4, even if it won't ever happen.
Personally, I'd be happy with a Naughty Dog-produced Jak 4, certainly, more so than most other devs I've seen people suggest, to me, Insomniacs have mostly been just making more child-appropriate shooters with their Ratchet and Clank titles, sure you sometimes have to jump over something but they're certainly not comparable to the level design in the Jak titles and Naughty Dog are still one of the few AAA devs left to never sully their setting by filling them with simple repetitive tasks and easy to break RPG systems, "well Jak 3 exists but it's still not as bad as a lot of other games in that regard" it's unlikely to happen given that they've abandoned Jak projects twice now but if it's not Naughty Dog I'd take Ember Labs, they certainly understand how to make a good PS2 era action-adventure title better than pretty much anyone else.