Just to explain this part - there was a realm consolidation not too long before the Wrath pre-patch. They deleted several realms, but before they did there was an open period for people to move their characters to realms of their choice. If a player didn’t take advantage of this service, then they were force moved to a preselected realm. Bleaumax was one of those on the chopping block, and the characters from it that remained were pushed over onto Sulfuras.
Unfortunately now, they have realms locked for population control, as Jetsum explained. The locks will likely not be in place forever, but there is no estimated time of unlocking. What you can do is keep an eye on this post or the support article that will be updated (or a new post crop up) with any updates.