The Knight, Death and the Devil
I have used the Uccello painting (linked above) as a jumping off point, but I have decided to portray the scene allot differently and have modified the roles.
The Knight - He would have expected to have killed the beast by his chivalry and goodness alone, well he's feck'ed it up, lance broken, he's had his chance and blown it and is now lying on his back, rather than standing over his quarry.
Death - This role has been allocated to the lady, rather than have her standing back forlornly holding the leash, she is more involved coming to her companions aid, ready to administer the death blow. (It's 2005 who says chivalry is dead?

)
The Devil - well this would be the dragon - Black, he's a particularly nasty one, the epitome of evil. A knights greatest achievement would be to slay such a beast but this one's wise to dragon slaying ways. He snapped the Knights lance and has driven both horse and rider into the dirt. But I bet he wishes he had eyes in the back of his head!
As mentioned in my previous post, my notion of incorporating the dice was an important aspect. Dungeons and Dragons has come a long way in its 30 years, and to symbolise the years I will incorporate a die for each year in the image, tucked and hidden away for the viewer to find. This image is going to be packed with symbolism :P
That's the notion, right now to get it started.
Hel