I don't think the story or characters will matter much. The first one just used the common trope of a divorced couple who still have feelings for each other thrown into a disaster situation as a way to create some tension. People remember the cow flying through the air. Can anyone even name the characters?
It was fine, but I don't have any connection to those characters. The ones I remember from these types of movies are the original Jurassic Park cast. They felt genuine to me. The backstories didn't feel forced. Some will say pairing Alan, who doesn't like kids, with kids, is contrived as well. To me, it didn't feel like it was, and it's admittedly a hard line to walk.
I think JP did a good job developing the characters before any action started, rather than just dropping them in and letting a cliché backstory do the heavy lifting.
Who knows though. Audiences are unpredictable and perhaps more discerning nowadays. It takes something special to get me to the theater.
I don't think anyone's making hard predictions one way or the other at this point. We don't even have a trailer.
It just feels like an odd choice given the original had a satisfying and contained story. The hero is dead. The villain is dead. There's no redemption or revenge arcs to be had.
Not to say another movie set in that era can't be compelling, but I've never ever thought I wanted a direct sequel to that movie.