“We told a complete story with the trilogy. If we went back and made another one, we’d have Michael J. Fox, who will be sixty next year, and he has Parkinson’s Disease. Do we want to see Marty McFly at age sixty with Parkinson’s Disease? Did we want to see him at age fifty with Parkinson’s Disease? I would say ‘No, you don’t want to see that.’ And you don’t want to see Back to the Future without Michael J. Fox. People say, ‘Well, do it with somebody else.’ Really? Who are you going to get? All you’re gonna do is beg comparisons to the originals, and you’re not going to match up. And we’ve seen this repeatedly with sequels that go back to the well after many, many years, and they go ‘Ah, well, The Phantom Menace, maybe my life would have been better if I hadn’t seen it.’ There are a lot of extra sequels like that. We didn’t want to be those guys who did a movie that was basically a moneygrab. Universal says to us, ‘You’d guys would make a whole lot of money,’ but we’re like, ‘Well, we’ve already made a whole lot of money with these movies, and we like them just the way they are. And as proud parents, we’re not going to sell our kids into prostitution.’”