It's not a team up movie, it's an origin story. Lets rush through how he got his powers, and kill both his mentor and his primary antagonist, all in about 30 mins, oh we have to cut his orphanage out too, but we should shoe horn in Superman for some reason.
How do you expect me to want more Billy Batson if you blow all his best on this piece of fluff.
How do you expect me to want more Billy Batson if you blow all his best on this piece of fluff.