His job is to acquire IPs and create the physical event. He usually has no say at all in the way the event is marketed. That's a completely different team. That's not to say the idea wasn't his, they're most likely holding the announcement until something like a commercial, or the 2016 advertisements get released. With a line-up THIS stacked it's unfair to pick one horror icon as the main marketing image, thus formed the creation of Hollywood Harry, a Master of Ceremonies for this year's event ALA Jack @ HHN17 in Orlando.
This'll be a good year. Times are a changin. I just wish they'd get rid of the purge.
This is just my theories btw. It could be totally different in the end.