By all accounts, it looks like the main attraction won't use the Test Track / RSR slot car system. Either on here or on Twitter, I saw a post about a Dynamic attractions ride system that could be utilized for this. The hesitancy would be 4 person vehicles instead of 6, but that's what's depicted in the concept art as well:
dynamicattractions.com
As for the secondary attraction, it looks like it could be a trackless flat ride similar to Rollickin Roadsters, but hopefully closer in execution to a dry Aquatopia.