Because they are both modules , it's not possible to directly create a single game with both combined at the same time. If you have a Pro subscription, you can use the Transmogrifier to move things from one game to the other. Otherwise, since Dungeon of the Mad Mage has All Access Vault enabled, you will be able to play through Dragon Heist, then take your current characters and import them into DotMM. However, any handouts, macros, or other things would have to be moved manually.