I suppose thankfully from this, at least Fenrir is being added too, thus our character names will remain ours. Still though, since I can't play XI due to it suddenly not working on my 64bit PC, it doesn't really matter...
World Merge will be performed
during the upcoming maintenance scheduled for Mar. 16, 2011. Once the
maintenance is complete, characters from the "Source Worlds" will be
migrated automatically to the "Destination Worlds."
* The schedule for the maintenance will be released at a later date.
- Details on the World Merge
The following is a list of Worlds designated for the World Merge.
Source World -> Destination World
Ramuh -> Bahamut
Alexander -> Shiva
Titan -> Phoenix
Gilgamesh -> Carbuncle
Unicorn -> Fenrir
Ifrit -> Odin
Diabolos -> Siren
Caitsith -> Ragnarok
* Other Worlds will not be affected.