Emperor is a blown-opportunity movie, which purports to be about General Douglas MacArthur's decision whether to try Emperor Hirohito for war crimes in the wake of World War II.
The Call does, as accused, turn in the end from a first-rate police procedural about how the 911 emergency system operates into a story of first-person heroics by Halle Berry.
Oz the Great and Powerful is a fun movie not unworthy to be a successor-- as a prequel-- to the great MGM movie of 1939. It isn't as good as The Wizard of Oz, but what is?