The chances of this are rather low. Irem doesn't make video games any more - their last game was in 2009. They moved (back) to making slot machine games. They're still around though, so they still own the R-Type license. The closest thing they that have to a successor is Granzella, who have some former Irem staff, and who have been largely focused on PlayStation Home. While it's not impossible for there to be a new R-Type game this generation, I certainly wouldn't expect there to be one.