Originally Posted by Mercy
That is not the point of the feature.

It won't be a straight character transfer. It's a copy/paste feature. The original character would still exist on its original realm. The idea is to allow people to "move on to the next expansion" if they wish, and not leave behind achievements, titles, pets, mounts, transmogs, etc. but they won't lose that character on the previous expansion they were playing on in case of regret, accident, etc.
This is something I'm looking for in future.