All i have is a plotline (King-Momo-Sanji), their designs, their fighting style (they fly, kick and use fire) and a clash/attempted murder.
Potentially, Judge studied King and his race.
Queen is a scientist that knows another scientist and that showed no grudge towards Sanji or the Vinsmokes. And has like 4 or 5 enemies that he would be really glad to kill: Drake, Chopper, Apoo, Marco and maybe Kawamatsu.