My reasons for asking these questions is because i am amazed at how well organized and unique the forum is, even though it doesn't have an owner again (after Satoshi Nakamoto left) since Theymos stated and i quote that the forum is now owned and dedicated to the bitcointalk community in general.
The forum doesn't need an owner, it has a management. And, the forum is "well-moderated" because because it has moderators that manage most of the operations such as reports, removing unnecessary stuff and banning those trying to take advantage of the forum in some way, etc. Theymos, as the head admin, mainly does the main stuff such as making changes, implementing systems, appointing/removing moderators and merit sources, etc.
We all know about that but i'm emphasizing more on the number one citizen of the forum (head administrator), how will a new administrator emerge after Theymos? please understand my point.
I can't say for sure, but the decision will most probably be made based on certain factors such as activity, posts, recognition, trust, merits, etc. You can find the lists containing all this information at
https://bpip.org/.
The decision could also include voting from the most trusted and recognized members of the forum along with the current admin, theymos. However, these are all assumptions and I believe there has never been a public discussion about this thing so far, if I'm correct.