Eminem's last album was "Recovery", released back in 2010.  Time flies and it's been almost a full three years since his fans have gotten a new full product from him, aside from singles and features he's been on.  However, Shady Records president Paul Rosenberg reported to Billboard that Em will in fact be aiming to release a new album this year.

"We fully expect to be releasing a new Eminem album in 2013. He's been working on it for some time.  It's safe to say that it will be post-Memorial Day at some point, but we're not exactly sure when. We've got some dates locked in for him to perform live in Europe in August, so we're trying to see what else lines up."

Yelawolf and Slaughterhouse are apparently working on new products for their fans as well.  

Source: hiphopblog.com