The first was lightning in a bottle
It's success can't be replicated, because too many things happened during it's time that can't be repeated.
First, we had the 80's. a time when the sci-fi genre was transitioning to something more adult and grounded, and less fantastical. We had Ridley Scott as director, just riding off Alien's success. Ford was younger and arguably at his prime, also coming off the success of Empire Strikes back and Raiders of the Lost Ark. You had Vangelis coming off the success of Chariots of Fire, which won numerous awards, including having won an Academy Award for Best Original Score.
Now, lets look at what we got going for Blade Runner 2049:
We have our director, Denis Villeneuve, who is not coming off any recent successes, and his latest movie got snubbed big time, deservedly so, because honestly, Arrival was nothing to write home about. (Boring and pretentious AF) He hasn't proven himself to even be in the same league as Ridley Scott, not even a much older, and arguably, past his prime Ridley Scott. Jóhann Jóhannsson? Who the **** is that? I don't know any music this guy has done to that would be considered memorable. As far as I know, up until this movie, he was a nobody.
As for Ford and Gosling. Ford is way past his prime. The guy hasn't made a decent film in years. In the Force Awakens, he was riding on Nostalgia to keep the fans happy. He broke his knee on set from a prop model. The guy almost died in a plane crash just a year before that. In regards to his current acting career, he's running on life support. He hasn't driven a movie himself, since the Crystal skull. That was almost a decade ago...
Gosling? He's is still riding off his goodboy looks, since the Notebook. La La Land may have been able to swoon award critics and young female movie goers, but how many went expecting another Notebook? He has never starred in, nor driven a sci-fi movie, especially not a sci-fi classic like Blade Runner.
When you sum it all up, this movie has a higher chance of failing. I wouldn't go in expecting a similar success to Fury Road. People are just getting their hopes up for this to even be considered as entertaining.