Upgrade sounds better to me also. I know "The Predator" was used to make it sound like the upgrade was supposed to be the ultimate or gold standard of the Predator race, but it really was just a one-off - artificially designed for a purpose. I feel like a classic with superior fighting skills, brawn, intellect, etc. would have been much more fitting for the title of "The" Predator imo. But regardless, I agree - the use of "the" altogether is just....unnecessary?