I just returned to Warmane, it's been a while since I was here last, Outland server to be exact.
So I noticed a realm swap could be done under services for my characters on Outland.
However.. I accidently swapped them to Frostmourne instead of Icecrown as I wanted since I have friends playing there.
I already made a ticket but since I can't see anything about this issue under realm swap FAQ I thought i'd give it a go here and see what the chances are of that happening, if anyone knows of course.
Well, Frostmourne characters will be moved to Icecrown when frostmourne finishes all seasons anyway.
You may try sending an email to [email protected] but it's not guaranteed that they'll move your character.