40 Minute Washboard Solo

Based off this page from the Theme Park Fanon wiki, this is Six Flags Indiana as it appears in 2018, the year before SF randomly drops the ball on what is essentially an elite park for no reason at all. New for 2018 is Total Mayhem, an S&S Free Spin located near Apocalypse.
 
You're going to need the following CS and CTRs:
Six Flags Entrance (IDK who made it sadly)
Nightflight CTR (again, no clue who made it)
JCat's Steelworx
Moby's Steel Jungle
Sanba Balloon
Red Baron
SpaceShot and TurboDrop (maybe by ImagineerJohn? I forget who made them)
That one waterpark CS set that has the tipping bucket (forgot the name)
ATH Catwalks
SafariJ's Arrow Supports
 
And you need Soaked and Wild to open the park. If you have all those, enjoy!

From the other major timeline park I'm planning on doing, King Kobra opened at Forest Frontiers in 1982 and was, along with Six Flags Darien Lake's Viper, the very first roller coaster in the world to feature 5 inversions. In order, the inversions are:
Vertical loop
Batwing
Double corkscrew
King Kobra thrilled riders until 1999 when it was rather brutally retired by Paramount. The remaining spare parts were used on Valleyfair's Corkscrew, and the land the ride once occupied was used for Top Gun: The Ride (now Afterburner), a B&M Floorless that shares a layout with Scream at SFMM.
 
CS you will need:
Maylene's Classic Corkscrew
JCat's Steelworx