The interesting thing is that Adam Shankman is producing (and maybe directing?). In case you aren't familiar with Shankman's work, well, incidentally he made two movies starring Martin, Cheaper by the Dozen 2 and Bringing Down the House, the latter which also starred Latifah. Wait, I think I figured out the idea: the new All of Me will turn the old one on its head by having Martin play the character co-inhabiting Latifah's body. Of course! If there's anything that could be worse than a man having to share his body with the mind of a woman it is an African American diva having to share her body with the mind of a white guy.
In case you have never seen the original All of Me, you should probably check it out before the remake comes around and lowers its value. It came out in 1984 and was the fourth consecutive collaboration between Martin and director Carl Reiner (the first, The Jerk being the best one, of course). It was also the last decent movie made by Reiner as well as Tomlin's last decent starring role in a comedy (sure, I have soft spots in my heart for both Reiner's Summer School and Tomlin in Big Business, but there's no point in defending them). My favorite part of the whole movie, though, involves the great character actor Richard Libertini, a ringing telephone and a toilet bowl.