There’s probably nothing we can do about it.
If a guest cancels early enough, we will try to replace them with someone of similar stature. This sounds easy until you remember that most celebrity contracts take a month or more to get finalized. If they cancel close to the expo date we have very few options.
We hate it as much as you do! How can we say that? Because we hate disappointing our fans… and we buy non-refundable plane tickets.
In the end though, ask any seasoned convention goer and they will tell you never to attend any convention based only on the appearance of any single celebrity. All conventions experience cancellations and we have been blessed to have relatively few over the years. There is a lot of life going on out there in the real world.