I do want to say that they do make conflicting statements. Here’s the Time-Stamp Video of the Round Table Meeting, discussing this:
But, during their Q&A, they also said this (Time-Stamped, for your convience):
Well, that’s a great question! And, I think kind of building on what Holly said, it really is like a “snapshot” taken, at the time we launch the patch. And, so, at that point, you do have your name, in both places. Um, of course, part of the reason we want to make people, uh, make a choice here, and encourage them to choose the place they want to go, is so that we don’t have people parking on those names, forever. So, at some point, we might, uh, decide to, uh, relax that, and let those names be unreserved. But, if you decide on “Launch Day”, that you’re gonna pay for the clone, and you want to have that Clone in both eras, you’ll have your name in both places. Uh, one of the things, we’re (also) concerned about is, though, what that looks like, in Classic Era. Like, uh, as we expect most players go to “Burning Crusade”, and we’ll probably have to do something to resolve that. Our current plans is that you’ll be able to keep your current name but probably have something similar to our "Connected Realms, that let’s you have a (the) “Realm Name”, on the end, so we could resolve any conflicts, if we have to do any mergers, like that.
Key statements:
And, so, at that point, you do have your name, in both places. Um, of course, part of the reason we want to make people, uh, make a choice here, and encourage them to choose the place they want to go, is so that we don’t have people parking on those names, forever. So, at some point, we might, uh, decide to, uh, relax that, and let those names be unreserved
Our current plans is that you’ll be able to keep your current name but probably have something similar to our "Connected Realms, that let’s you have a (the) “Realm Name”, on the end, so we could resolve any conflicts, if we have to do any mergers, like that.
My take from that is you either lose your Name, if you wait too long or get the Server’s name you’re playing on slapped on next to it (possibly CRZing/Connected Realming/Virtual Realming Perma Classic). Again, that is, if you wait too long. Otherwise, EVERYTHING else is saved/archived.
EDIT: With the exception of Guilds (for Classic only)
- Characters activated on a Classic Era realm are all guild-less, including Guild Masters. On Classic Era realms, all guilds must be recreated
Hope this helps!