I won't go so far as to say this is better than Terminator 2, but Gremlins 2 is such a great sequel. Some people are turned off by the zaniness, but I love how it's basically a parody of unnecessary sequels and that they just swung for the fences with it.
I saw another comment that spurred my thinking. There are (how many?) sequels in the Terminator series that have only been increasingly worse all because Terminator 2 was so good.
The same goes for Star Wars. Empire Strikes Back is a damn good movie by any measure. I’m confident none of the Star Wars movies since have managed to even come close, and I’d even say the only ones really worth watching are the first, the second, and the immediate prequel (Rogue One)
Hate on Michael Bay and his Transformers movies all you want, but there is only one movie with more robots that turn into more things than cars, more explosions, more ridiculous destruction, more awesomeness, more movie than 2007’s Transformers, and that movie is Transformers: Age of Extinction.
A giant robot that turns into a semi-truck painted with red flames, wielding a sword while riding on the back of another giant robot that turns into a flame-breathing T-rex robot. It’s unparalleled in the stupid dumb action movie genre.
I guess I will need to rewatch 2049 again (I've only seen it once, in the cinema at release). I've watched the original quite a few times since though and I'm increasingly of the opinion that it's quite overrated and gets heavily carried by the visuals and the soundtrack, so I could see a case being made for the sequel being better.
The original is a masterpiece. That said, I loved the sequel and have rewatched it multiple times. However, I don’t know if it is because I love the film or just anything Ryan Gosling is in 🤤😅
The first movie I saw with Gosling was Lars and the Real Girl. I didn't get his appeal then, but I do now. I should watch that movie again because as weird as that movie is, I think his performance is stellar.
Bending the rules a bit here. I know it is not a true sequel, but it's part of a trilogy. Hot Fuzz is better than Shaun of the Dead.
Also, except for the second film, I think the Mission Impossible series just gets better with every entry.
About two years ago, I watched all six, as there were then, over the course of a couple of weeks. For me, the second film stands out as being the weakest.
I think I need to watch Dead Reckoning (formerly part 1) again as I was slightly disappointed seeing that.
Godfather II.
The first is honestly kind of hokey and people are really stupid when they are trying to be clever. GF II has higher levels of tension and the execution of everything is smarter. And Robert DeNiro just slays playing young Marlon Brando.
Toy Story 2? My other answer would be Godfather part II, but it's been so long since I saw it that I don't know if I agree with that commonly-held opinion.