I believe they are going to have it again next year, it was such a huge success this year. I have a lake house there and have been flying into KDZB for years, the runway is in incredible condition. I'm sure that's why the GTR, Lambo, and overall 1/2 mile world record were all broken there this past weekend.
It is truly mind blowing how well sorted out those Underground cars are. We used that 233mph car all weekend around the resort like a golf cart and it didn't behave any different than my stock SL...until you put your foot in it! :willy Justin even drove it back home to San Antonio!