Hmmmm... $50 million...?
First off, paint that skyline in Dark Knight.
Reopen Houdini
A. Retheme Nitro's station, it's so boring.
B. Add a soundtrack to the lifthill of Nitro, with suspensful music
Get RID of Great American Scream Machine, sell the metal for scrap, and build a stand-up coaster BUT keep the same station, I like the station.
Build a Looney Tunes themed boat dark ride or maybe not a boat, that went through famous scenes in the cartoons.
Retrack Rolling Thunder, I heard they did that to Hurler and it got a lot smoother... and give it a new coat of paint because it looks horrible.
Add more theming elements to Boardwalk (make it more like Hershey's Boardwalk, with postcards from real boardwalks, seagull sounds, etc.)
Build a dark ride (like a haunted house ride)... they really need one, or maybe even two. It doesn't have to be Disney-amazing, just like stuff you would find on the Boardwalk on the shore... with cool stunts and stuff.