How it is possible that many good fan ideas will never be realised but such utter lunacy went that far in developmental stage? Ideas in original Predator like camouflage or plasma caster were otherwordly yet at the same time grounded. For example while it was obvious that camouflage and plasma caster required a power source not known to human science, it was depicted in reasonable way as Predator had a big battery on the back to power it and complicated control panel.
Now we have invisibility balls, nanite PK suit and time travel. Last thing doesn't fit thematically in this universe, even for Engineers that are implied to be more advanced than Predators.