Well with the sale of SFWOA to Cedar Fair comes the realization that the rights to DC Comics and other Six Flags trademarks is out the window. Which rides do you think will be renamed, and what do you think the new name will be?
Here is my short list...
Superman: Ultimate Escape ---> Steel Venom (pretty much a clone of the one in MN.
Batman: Knight Flight ---> They will probably use some bird name like they did for Raptor and Talon.
Serial Thriller ---> Six Flags may have this licensed as the name is used at other parks. Is Hang and Bang too descriptive?
Mind Eraser ---> Same story as Serial Thriller. My guess is they will just go with Boomerang.
Your suggestions for Serial Thriller, S:UE, and Mind Eraser make sense, but I have no ideas whatsoever for B:KF. I'm looking forward to hearing the different name for this in particular; it'll be strange looking at the layout, which has always been known as B:KF, and seeing a different name, and possibly a different theme as well.
Zak-- The simple answer is...ownership rights. For better or worse, Six Flags has chosen to theme most of their rides based on characters that they own the rights to. It's good cross-promotion, and besides...I don't think Six Flags expected to sell off what they were beginning to consider a "flagship" park within two years of its purchase.
In any event, even though CF isn't the greatest at theming, I think the park will be in fairly good hands...and as for the original topic impetus, I agree with Gonch that they'll probably strip the character names and keep titles where they can. Just easier that way.