This is a really dumb change in my opinion. If you replace Aquaman with anyone, why would you choose another flying brick with jet-black hair? Why would you choose another joke-y male? I say this as a fan of Billy who thinks he could be the next big thing. Shazam couldn't just have his own showcase as a dvd extra? There were no other female characters to choose from like Mera, Zatanna, Hawkgirl, Element Woman, Starfire, Vixen, etc? I thought these people cared about diversity or variety? I guess there is a quota...
Personally, I would have added Vixen, Element Woman, or Zatanna instead for variety if I had to, but I'd have likely not even replaced Aquaman and kept the roster to 6. Every joke Shazam makes is a joke that could have gone to Flash or Green Lantern. Now their roles will be watered down and less special. *Sigh.
I don't see why the Cyborg/Shazam friendship is being pushed since Billy is 13 and Cyborg is around 17-23. It's a little weird.
Expect Aquaman to debut in the rumored Throne of Atlantis adaptation--Justice League: Invasion.
Good to see Darkseid's role expanded upon. This likely means that Darkseid's daughter will be revealed in the comics before this movie is released. The voice cast looks good--especially Batman. The jokes seem much funnier than in the original book.