It hasn't been officially announced yet, but the Versailles OHP has been updated with a new image including a new, 5th member, which I believe to be Teru. People on 2ch in the Aikaryu thread have also said that Teru has joined Versailles, but I'll let you guys decide for yourselves if you think the 5th member is Teru or not:
Second from left. (close-up)
Just a warning, the site takes a bit to load even on DSL, so please be patient~
What do you guys think?
Hopefully there will be an official announcement on this mysterious 5th member soon, and I really hope it is Teru (though I'm really already convinced it is him >x>;).
ETA: Nevermind speculation, the video Kamijo told everyone to look for has been found, and it shows that Teru is indeed the 5th member of Versailles!! Yay! ^3^/
Here is the video: http://www.youtube.com/watch?v=Bg7OShlLwyk