I was just at the park a couple days ago and I'd estimate they're about two to three weeks out from testing. All the framing is up in the station, but they still need to finish the walls and roof. Once that's done, they should be ready to put a train on the track and start running it. It will be open for 2019, but my guess is it will open around the start of winter break so it might as well be a new for 2020 ride.
Speaking of 2020...rumor is they are getting a new ride of some sort but won't be announcing it until after West Coast Racers opens. I'm not expecting anything big...maybe a Zamperla Endeavor or similar.
Coaster Count: 535 (114 wood, 444 steel); Park Count: 110 Top 5 Wood: El Toro, Voyage, Thunderhead, Outlaw Run, Boulder Dash Top 5 Steel: Superman the Ride, Fury 325, Millennium Force, X2, Intimidator 305
The wait in between those 2 short rides looks like it's going to ruin it for me. These may still be test runs, but I can't see Six Flags and the GP getting settled in those trains fast enough, so that the ride experience will be a full smooth run in one go.
Coastercount: 1410(I've seen the world and it's horrid contraptions... @.@) - Wood: 142 - Steel: 1268