Personally, I’m not sure about this neither.
Universal has been recently sending patent for technologies and ride system that may use for the ride for dark universe expansion. The ride system and these drawings on patent seems bit different from rocking boat system.
One of the boat ride system blueprint is hiding a animatronics inside the front area of the boat as well.
Also from my many conversation with creatives and staff members, I don’t remember we’ve been discussing specific ride manufacture or detailed description of type of ride system beside IP will utilizing black lagoon and a the type of ride will be a boat system.
Thats all I know for now and what we can do is gathering more clues and speculate.
Honestly with a pace of universal has been filling recently for expansion and the history of our forum, I think that we’ll gather more clear and detailed infos to figure out the specific ride type and the ip being utilize within year and a half.