Tonight I ran into this image. It is from the new adventure 'the rise of Tiamat' of the new D&D series (5th/next?) It shows Tiamat arising from a portal or the ground.
Considering the adventure you can use it in the temple, with the arrival of the aspect of Tiamat. You can also use it as the painting Wyrmlord Koth has just finished. It would be a some nice foreshadowing to what to come
source: http://www.madadventurers.com/wp-con.../05/Tiamat.jpg