IF and thats IF they choose to release an SDK or mod tools, think about it. This is a highend game with high end content. This isn't your 90 polygon challenge or your one texture fits all scheme.
If you're serious about a mod package tool, then be absolutely willing to commit to highend level detail mods that only big studios have the time to do. Nobody is going to waste their time downloading a ludicrous texture mod or anything thats less than extraordinary.
Its not your hobbiest going at it, its your balls to the walls production artist.
On that note,
If there would be any modding going on, to the general gamer, hobbiest modder,they should allow content to be altered at the programming level, ie speed of a NPC, number of NPC, limit of such and such. Much less the same as programmer logics that anyone could figure out and manipulate to their own desire.
I don't believe there is much use today for mod tools unless its for a massive multiplayer world where you could make your character a zebra headed lion bodied archer or something out of warcraft.
This is considered NEX GEN or whatever that means, so there is far much more things you would rather be doing than to consider going full out and redesign the Alien or predator as such unless you're totally artistically inclined to create something that could the current model out of the water (i think they got it close already but a little here and there touches-personally i would consider a full TOUCH UP MOD that would fix minor little things for both alien and pred models).
Please do not even consider full MOD TOOLS and character customization if your a beginner at game modification or 3D modeling. Just play the game as is. This isn't your 90 polygon per character AVP1(so last decade). If you want to MOD then you should try modding the 1st one. Its well worth it and considering its technology any improvements like the H.R. mods. would be super cool)
The COMPANY has spent alot of time to make this shindig badass.Not for you to poop on.