Some type of glitch or bug is allowing players to take control of the fort already, which is pretty annoying if you ask me. "Zero Infantry Legion" currently has control over it and is gaining free hours from it.
Maybe the guild for is being taken over in testing?
No. The towers are programmed so they are always taken over by some type of guild. The developers put (none) as the owners of the tower, even though that guild doesn't exist. If you looked on the leaderboard you would see a guild called (none) gaining hours, yet if you clicked on the name it would say "that guild no longer exists under that name".
A trusted source has just informed me that inside of the new tower, there is a large Dragon-like monster that you must defeat before gaining access to the flag room