Body-switching comedies are one of those ideas that Hollywood just won't stop producing. The sub-genre (if we can call it that) had a heyday (if we can call it that) of father and son body-switching in the 1980s starting with 1987's Like Father, Like Son (starring Dudley Moore and Kirk Cameron) and followed in 1988 by Vice Versa (starring Judge Reinhold and Fred Savage) and, in a real change of pace, 18 Again! (starring George Burns and Charlie Schlatter as a grandson and grandfather combo). Also in 1988 was Big, which had a twelve-year-old kid switching bodies with his older self (Tom Hanks).
Jason Bateman was all too-aware of the body-switching deluge, and admitted to Entertainment Weekly (print edition) that he suffered a "Really?" moment when first presented with the idea of joining The Change-Up. See what changed his mind, plus the trailer >>