Why is he still called 'Shazam' in the character section of the official site? He's not Shazam, he's Captain Marvel. Shazam I is the old wizard who gave him his powers and Shazam II is Freedy Freeman, formerly Captain Marvel Jr..
I wouldn't mind seeing Shazam (Cap Jr.) as an 'alternate costume' to Captain Marvel a la Yang and Yun from SFIII though. It'd be a rather simple add as well, just change the voice samples, name text, and slightly alter the model.