We have just received the following statements from the agent of Michael Shanks and Amanda Tapping...
Michael Shanks must regretfully cancel his appearance at Gatecon in September due to filming in Toronto. He wishes all the best to Richard and the Gatecon family.
and
Due to a previous contractual obligation for a cancelled tour in Australia, Amanda Tapping cannot attend Gatecon in September. Ms. Tapping regrets the inconvenience to the promoter and her fans, but unfortunately, this prior commitment could not be worked out for any other dates in 2016. She wishes Richard a successful event and looks forward to participating another time.
We are as disappointed as you all but are determined not to let this lessen the enjoyment of The Homecoming, and will be actively seeking replacement guests to fill the gap.