I was thinking of creating two alternate ending cards for use with 'The Dragon', one for using the Dragon Tower and one for the Dragon Realm (both for revealed endings, obviously), and shuffling them in. If either comes up, play a game of The Dragon using the middle board. If a different ending comes up, I'd just use the regular board.
My main thoughts for doing this is 'The Dragon' doesn't look like it would play well with other alternate endings. This would be a way of playing with the contents of the expansion, but only occasionally.
It seems like I'd be less likely to get tired of the 'fiddly bits' this way as well.
Has anyone thought of doing this before? If so, do they have a pdf of the alternate ending cards I can use?