Cap actually has a decent amount of alts, with colors from, Mary(white) and Junior(blue) He could also
Both Captain Thunder costumes http://www.marvelfamily.com/images/whoswho/CaptainThunderII/CaptainThunderII_flying.gif http://insidepulse.com/wp-content/uploads/2012/02/Shazam-Captain-Thunder-Flashpoint-interior.jpg
He could also do Crime Syndicate, Captain Super http://images2.wikia.nocookie.net/__cb20110110161649/marvel_dc/images/1/1b/Captain_Super_Co2E.png
Hell even Bizzaro Captain Marvel http://images2.wikia.nocookie.net/__cb20110110161649/marvel_dc/images/1/1b/Captain_Super_Co2E.png
As for his super I'd like to see a reboot of his old Heroic brutality in MkvsDC where he uppercut his opponent in the air and sen them back down with a boom by saying shazam and hitting them mid-air. This time of course they go orbital when he hits them, and the lighting comes from the heavens and crashes them down with a nice mushroom cloud effect.
Another his that he could grab in a bear hug, shout shazam, but instead of just letting the lightning fry his enemy, he flies up having the lighting hit the opponent multiple times. And then come down with biggest german suplex of all time
Where is that crime syndicate pic from?
It from the animated movie, Justice league Crisis on Two Earths