Quoted from accidental:At the seminar I think but I have no idea where to find this information. Perhaps these are people who were there. I'm hanging out for an official publishing of the info revealed at the seminar!
No info other than Andrew pointing at the playfield diagram on the screen. There is a mode screen in front of the queen. When appropriate the whole area turns around taking the screen out of the way and revealing the queen.
Probably more comments on the alien thread.