With one of the many rumors being that Black Panther will be introduced into the Marvel Cinematic Universe, not relaunching his self-titled comic would be a mistake. Even if Black Panther isn’t in on the slate of films before Avengers 2, it would still be a good idea to put it out there because people want the Black Panther movie and you can build a lot of interest with the comic.
I know Marvel has said that this isn’t a reboot because the continuity will stay the same, but they might want to consider at least retconning a few things for the sake of new readers. I can’t imagine many of them know that he and Storm of the X-Men are married. I think it would be best for the readership to not re-do the origin of Black Panther but at least re-tell it in a more modern way with sprinkles of the rest of his comic book continuity.
Likelihood of happening: I’d say flip a coin. While it might seem like a good idea here on paper, maybe past Black Panther sales weren’t what the company was looking for.