Summerhall

In  your Summerhall theory that Egg intended to sacrifice his great-grandson, Rhaegar to give life to his dragon eggs.

Knowing Dunk, he would never have gone along with this. Do you think he could have been the one who ignited the wildfire to allow Rhaella and an infant Rhaegar to escape, dooming both him and Egg?

No, that’s not how I see it doing down, for one thing I don’t think Dunk would risk burning down an entire castle filled with people. I think the wildfire was always supposed to be part of the ritual, and Dunk’s role was in rescuing Rhaella and Rhaegar, and then going back in to rescue Egg.