This week we have something that does not happen very often — two huge movies in the same genre opening on the same day: “Get Smart” with Steve Carell and Anne Hathaway and “The Love Guru” with Mike Myers. One is based on a 1960’s television series created by Mel Brooks and Buck Henry. The other is a satire of the popular fascination with healers and less-than-credible spiritual leaders. Both star accomplished comic actors who began their careers on television. But the most important thing they have in common is former N’Sync-er Justin Timberlake, who appears on screen in “The Love Guru” and on the soundtrack (with Madonna) in “Get Smart.”