UPDATE: not really news as such, but I thought this was cool - any fans would know that the preds had nicknames to distinguish them from one another in the first movie (e.g Celtic, Chopper, Scar...)
well, in AvP2, the nickname given to the predator isnt to do with his appearance, but his mission. the predator in avp2 is called
'The Wolf'
because he has to clean up the mess that the incompetent clan from the first made (its a reference to Mr Wolf from Pulp Fiction)
I thought that was quite cool, nothing major, but still quite geeky.