It was going to be similar to the treasure edition, but in a better quality wooden box (in the shape of a coffin), with a numbered certificate of authenticity (out of 5, I was promised number 1 if it were to happen, grr) and it was going to cost approx €200, and have some more content (which hadn't yet been revealed to the g4g team), but now it's cancelled, so we'll never know.
I'm secretly hoping he sends me another email saying it's been confirmed again

xx