Six Flags transformed South End to Gotham City and DC Adventures to DC Universe.
Next, I would change Crack Axle Canyon to Scream Punk District. First, I would get rid of Goliath and Tomahawk. I would move Rock'n Rodeo and Houdini to Goliath spot and re-theme it and add a Zamperla Super Air Race like Daredevil from Fiesta Texas. Then ill add a launch coaster to Crack Axel Canyon old spot either a S&S Launch like Maxx Force clone or a S&S Axis Launch Coaster, it'll be a launch that we needed and something very unique to appeal to the general public. I'll move the warehouse to back of Batman if more room needed.
Then I would retheme North End to a New England weather theme like i.e. Nor'easter. That theme would already be perfect cause of Wicked Cyclone and New England Sky Screamer. Flashback, Air Balloon Race, Pandemonium and Scrambler would have to be renamed and a new paint job. Then I would get rid of Blizzard River and add a Mack Powersplash with a couple flats in Blizzard River spot.
Finally, I'll get rid of GCG and replace it with a single rail clone like Wonder Women Lasso and give it the same theme and name.
All this would be done by 2032
Only if I ran the park