From Screamscape. I'm kinda iffy on the rumored theme itself, but it could be executed well, or horribly:
This is a bit too detailed I think to be true, but the rumor going around some insider circles is that HHN 20 may be themed around the the wedding of Jack and Chance. Of course the impending nuptials will bring about a massive gathering of Icons from the past once again, each set to deliver a horrific gift to set the mood. Hmmm... I do kind of like it, but I still think it’s a bit too soon to bring back Jack again.