PS1 classic wouldn't be that hard if you take the same developers who signed up for NES/SNES classic and all the crap Sony has first party wise.
N64 classic is harder because while you could do a decent enough system with just the Nintendo stuff most of the best third party games are oddly enough heavily licensed things like WWF No Mercy, NFL Blitz, Tony Hawk Pro Skater 2, Spider-Man.
N64 classic is harder because while you could do a decent enough system with just the Nintendo stuff most of the best third party games are oddly enough heavily licensed things like WWF No Mercy, NFL Blitz, Tony Hawk Pro Skater 2, Spider-Man.