Therory on the Will of D

Hey, I’ve got a little theory about the Will of D. that ties in with a lot of stuff.

A while back, there was a theory that it actually represented the moon, in reference to 'the Dawn' and all that. But what if the 'D' is actually a laughing mouth? The exact same smile/laugh that every member of that family has when they face death!

In my theory, this laughter is Joy Boy’s secret weapon, the only thing capable of defeating Imu of reversi, which feeds off people’s anger.

That would also explain why Gol D. Roger laughed on Laugh Tale. Maybe the secret written on the final Poneglyph was: 'To win, arm yourself with laughter.' It would explain why Luffy will succeed in liberating the world through his powers.

Anyway, let me know what you guys think!