Thanks for the quick info Zenaku. Sadly, we don't have a World Transfer Service for FINAL FANTASY XIV to remedy an issue like this. But, you can get a snapshot of the world mergers at our site here if you haven't seen it yet. Hopefully, you can get it sorted out before the big day. Make sure to get any name changes and things taken care of before a bunch more people show up with A Realm Reborn.
Thanks.