Oh, so you WANT my opinion here? Okay...
Here's the deal, I'd just be coming out of a climactic battle scene with Yahtzee - involving swords, because swords are cool - he reveals that he was never the true enemy, and that he was simply making sure I have the bollocks to handle what's behind Door Number One. To which, he backs WAAAY the hell off as the Do-Not-Open-Until-Doomsday Door opens up. Therein lies the horror...
The Escapist Monstrosity...
A mountain of horror, in which the base is made up of sickly-melded-together fanboys, millions in numbers who grasp and tear like zombies at the nearest fresh meat. On top of that, a huge armored chunk of moderators wielding the Ban-Hammer, Ban-Cannon, Ban-Scythe, Ban-Sickle (DO NOT SUCK ON THE BAN-SICKLE!), Ban-Bomb, Ban-Chainsaw, and all the ban-related weapons that were suggested before. Growing out of that is a massive humanoid body that is like a Fallout 3 Deathclaw with giant shoulder cannons and the cyber-baby final boss creature from Blazing Star growing out of its chest.
(And as a final, very last form, John Constantine from Hellblazer comics.)