And isn't Predator a part of the same universe? Considering the Jem'Hadar are fairly blatant Predator rip-offs this is quite interesting.
Actually the Nausicaans are the ones who resemble Predators.
The Jem'Hadar invisibility cloak used in their first appearance is the same effect as in Predator, the Nausicaan makeup resembles the Predator, and the Hirogen are, to all intents and purposes, Predators - but don't look like them.
FWIW, the Feledrin in On The Spot is the same alien species used in the Dr Who audio Unregenerate (wot I also wrote) and so far nobody noticed...