Freaking awesome.
I could nitpick on a few things with the full dragon form, but the sequence is too sweet for me to bother, especially when you've already specifically said you have issues with drawing dragons.
I can see potential for a few more frames between 3 and 4, but that would get into territory that requires an extremely good knowledge of both the original and target forms anatomy, which few artists can pull off well.
Anyway, again, good work!