I read a Batman vs Alien comic. It was awful, god awful.
The big bad was this woman, who got meta human powers because her embryo did not turn into a chest buster, but fuses with her.
Anyway it has Batman without gear in a maze. Amongest dead bodies were special forces and stuff. The xeno morphs in question acted and talked as "Humans" due to genetic alteration. (The basis that there were xenos, with traits of Batman's villains.)
He tricks them into destroying each other. And the final Xeno had Killer Croc DNA, and it killed said woman with "ease" and was the mightest of the Xeno-Rogues. (Ivy one was the most human looking.)
But yeah, he won due to being Batman, naturally.