I've seen a bit of comments in this thread worrying about Stardust closing for good, but I don't think anyone here should worry about the fate of Stardust Racers.
The thing with rides like Stardust racers is that their designs are not definite. You can redesign aspects of the attraction such as the trains, operations, dueling, etc as long as its not the core of the attraction. Which in this case would likely be the coaster layout (Which is probably not the issue here). We've even seen this happen before the attraction opened when it had trim brakes installed on the 2 top hats because the transition of negative to positive forces exceeded ASTM standards. As long as its not the coaster layout itself, Stardust Racers will open eventually. Its also worth noting that unlike the Orlando freefall accident, the family of Kevin Rodriguez Zavala have not stated that they want the ride to be dismantled, rather they want to see it closed until the investigation concludes.
Keep in mind that just because Stardust was operating normally during the accident doesn't mean its entirely safe, it just means that it was operating as it was designed to, even if there was a safety risk in its design. It seems from the press conference held today that Kevin could have hit his head on the railing in front of each car of the train, which would line up with Crump's claim that he was in row 1, or previous speculation saying he was in row 9. Assuming Crump's claim is true (Which I believe is plausible but not 100% sold on it. I don't think Crump is being completely honest about the details), then there's a good chance Universal or MACK will be held liable for the accident depending on if pre existing conditions/body type allowed Kevin to hit his head on the metal railing.
If pre existing conditions/body type did play a role in Kevin's death, then Stardust will likely have stricter safety protocols and restrictions to wheelchair guests to make sure that something like this can't ever happen again. Similar to the new restrictions that were placed on Hyperia at Thorpe Park recently.
If not, and this could happen to anyone regardless of health, Stardust will likely see even more downtime to receive modifications to the trains to remove the clearance hazard or receive new redesigned trains from MACK.
In both cases though, I think universal will settle privately. The whole accident seems like a PR nightmare and I can't imagine Universal wanting to risk more PR damage by taking the case to court. Universal has the money and will pay big bucks to move on from this.
Stardust Racers is going to be closed probably for the rest of 2025 while investigators figure out the cause of Zavala's injuries, but I wouldn't say that its gone for good.