Is Eminem poised for a comeback…for real this time? "I'm concentrating on my own stuff right now -- just banging out tracks. The more I keep producing, the better it seems I get," he said on his Sirius station, Shade 45, yesterday. "I start knowing stuff, learning the boards like the back of my hands." In fact, Em's spokesperson tells Billboard that the follow-up to 2004's Encore could be here by the end of the year! Just in time for a final performance on TRL perhaps? (Of the show's cancellation, he told the Associated Press in a statement, "I'm going to miss TRL. ... Where else will I be able to start feuds, defend my honor vigorously and act like an angry teenager on national TV? Oh wait ... The VMAs!") Hey, Em could be Britney at next year's VMAs!