Rereading the last issues of x-men (. 9, 10 and 12) where Destiny appeared or Rogue makes reference to her mommy, I don't think Rogue ends up in Xcalibur, and if she does it won't be permanent but just an one arc thing.
Going back to what Destiny said and that she needs Rogue and that she will soon see things as she sees them, I think that probably the final destination (lol) for Rogue will be Immortal Xmen, or maybe a new book where Destiny is also a satellite figure .