that is a super sweet picture infact im gonna save it
... however i dont think it goes with the theme of the joker... it would be awesome its self dont get me wrong... but with the original shapes of the bonnet the two "halfs of a whole" theme would fit and work perfectly... by all means put a fire up the centre but smash it right in the center and do a torn metal effect vertically down the lip of the centre.... as if the fire is underneath the metal of the bonnet (put skulls in the fire by all means) ... and the joker and batman have been painted above it.... start a thread on the works in progress... im seriously interested in where this bonnet ends up
think about layout and the bigger picture before you start... that way your piece will flow.. and if it flows it makes it not just good art... but great art... and thats exactly what we all try to achieve everytime we paint i reckon... no body is truely happy with "just ok"..
hope this helps a bit buddy
take it easy brother
T