The Magic of Shazam!
I'm thinking I want to introduce a new Mr. Scarlet and I think his alter ego is going to be Cincinnatus Butler, no relation to Brian Butler, the original Mr. Scarlet. (Someone stop me.*) Mr. Scarlet's sidekick will also be updated from the unfortunately named Pinky, the Whiz Kid, to Cardinal. I wanted to keep the red theme going and I like Cardinal better than either Crimson or Vermilion. Plus, as Cardinal can fly the name works on two different levels.

*To my shame, I actually thought up and wrote down the name Butler O'Brien. To my credit, I immediately punched myself in the stomach and denounced the idea as moronic.