Actually, just the reverse. The ELH content is there, but behind the scenes. ELH's power curve isn't jagged--there is about a level's worth of difference between 20th level characters and 21st level characters, which allowed us to incorporate aspects of it in BoVD and other projects that stretch above the bleeding end of 20th level. In this instance, if you have ELH, you'll find that Demogorgon is in accord with the power of a creature of his level from an ELH point of view. If you don't have ELH, you'll find that he is really tough, but no tougher than you'd already expect for a creature of his CR.
greymarch said:Should DMs change the stats of official NPCs? Can it ruin continuity of the game, and the trust of the players?