You have to replace xxxxxx with the park... for example...
Also, I did some more digging and found the Darien Lake accesso store page, but the only thing listed is the GOLD+ membership currently.https://sf-dl.secure.sixflags.com/packageDetails/80003385/navItem/Memberships
It lets you check out and everything, lol... though I would not recommend... especially since they haven't yet applied the subdomain security certificate. And. You know. The sale hasn't actually started yet and nothing is finalized.
Nothing really noteworthy except the sport bottles will be TEAL
and "Note: In-park discounts and friend tickets will be available at the beginning of the 2019 season (not available this fall)." since I'm sure they will still be in the old ticketing until next season.
I'm still 50/50 if it will be branded Six Flags or if it will be Great Escaped / La Ronde'd. No references to Six Flags anywhere. But that doesn't necessarily mean that won't change.