One of the things that's worked out in the past that one of my players reminded me of last night is the fact that while the PC's are staying in Omar's house. They may want to get back into B4 'The Lost City' By Tom Moldvay. And yes that's right we set the lost city as a backdoor dungeon into the black pyramid of Cha'alt. Which is kind of the point because parts of Cha'alt is a bit of homage to B4.
The most interesting bit was when the players mentioned the royal family of Torth & what might happen when the dragons arose there?! Bare in mind that we haven't gamed on Torth for almost a year now. Torth is of course from Venger Satanis's Reverly in Torth and the last time the PC's were hired by the royal family of Torth to retrieve Prince Silvus the III from the cult of the underground Cynidiceans. The party did eventually find him partying it up with the followers of Zargon. The party of adventurers managed to get him back home after tossing a priest to Zargon.
The Mindflayer Dragon hybrid mini from Monster Mayhem is what we've got in mind for the prince of Torth.