The Alien Warrior figure never existed in prototype form in 1986. The backstory is that this piece is a prototype sample of the Alien Warrior for "internal review". The packaging is a prototype package, modeled after the Alien ReAction Figures 2-Pack from 2013. The package is meant to be a mock-up, with hand-written notes about what is approved, needs to be changed, or filled in during the production process. While the original Kenner 3.75” Alien action figures were genuinely created and cancelled in the late-70s, and rescued by Super7 for ReAction Figures, the Super Size Alien Warrior is a "what-if" figure.
The Alien Warrior measures 18-inches and matches the features of the original 1979 Kenner Alien. It is articulated at the hips, shoulders, wrists, and tail, and has the same spring-loaded jaw mechanism to release the horrifying inner jaws, operated with a trigger on the back of the head. The figure can also hang from its tail just like the original.