“Palmer” is the type of conventional, formulaic movie that’s designed for audiences who don’t appreciate surprises. This redemption story about an ex-con who bonds with a misfit kid follows a tried-and-true blueprint that’s predictable and saccharine sweet, but the film has an honorable message of understanding and acceptance that celebrates unity — even if it does so on the most basic level. Former high school football star Eddie Palmer (Justin Timberlake) had his whole life ahead of him until a violent mistake turned the All-American boy into a convicted felon. After spending 12 years in ...