there was a mention on the last 3rd Rail newsletter I got. Basically it was a feeler. Scott asked for input on whether to do the GP7/9. He asked customers (people who got the newsletter) for their opinions on doing the GP7-GP9 series. He made this request in the last two Newsletters I received from Sunset 3Rd Rail.
So based on that, it is not a rumor, it is a proposal - somewhere between a project and a wish. He has not decided to do it and ask for reservations, but he has asked for us customers if we have interest. This seems to be because the SD40 project sort of flopped. Very light reservations.