EDIT: I know the beta’s over, and this is late, but I’d just like to point out that if this happened to you, your character is in fact retrievable.
Found a wall breach that allows access to a future zone, which disconnects you and prevents you from logging back in. Don’t try this, as your character will be locked away in a dark shadowy realm. As of the time of writing this, I’m unsure if your character is retrievable from said realm, however if this occurs to you, you are able to create a second character and continue playing.
Don’t mind the music I was listening to