The real ending would be that the aliens boost their troops with modified humans, just like what they supposedly did with the snakemen and the floaters (otherwise why bother with the invasion? Just launch nukes from orbit and be done with it)
So, what would be the alien human trooper look like?
The standard trooper should be a modified human soldier, enhanced with cybernetic implants for better sight and the like, directly linked to the alien brain just like all the other "people". Breeding would be done either through cloning or some sort of artificial womb system, which produces a new soldier within a few weeks just like the sectoids. The standard weapon should be laser rifle, which the aliens have reverse-engineered and perfected. The templates for these clones could be the best X-Com soldiers the aliens faced.
The accompying terror weapons should be those mutated four armed humans we see in the bad ending picture. There would have far less intelligence than a trooper, unable to fire guns, but be much stronger. Being able to rip apart enemies with their bare hands without any problems.
What do you think? Too bad no sequel picked up the idea.
Edited by itworks, 14 January 2012 - 06:07 PM.