I think the faction with more probabilities because of individual power of their troops is the Necrons (they were at the Power Armour League of Army before they started talking about wierd things like "honour", "commerce" or "truce") But I guess Tau have more versatility in their equipment, taking into account XV armour and weapon loadout. Also, they will have Eldar level resistence, so, not so unlikely. And as I'm a Tau Lover, guess who got the vote
Gonna go with Imperial Guard, but I am unsure how it'd be done. You cannot have just 1 guardsman running about as a player character as it'd die to absolutley anything. And you cannot just have a massive army of just Lieutenants or Commissars either, soI am usure... unleeeeess.. They went for something very unique, and instead of the player just being one guardsman player character walking about, they have it so the player is a Sergeant with a squad of guardsmen! The guardsman squad are like followers, following the Sergeant wherever he goes, and they can be equipped with several different kinds of weaponry and the guardsman's playstyle will be wholly based around him and his squad, as opposed to just one singular character!
WHY NOT ZOIDBERG? But in all seriousness, I'm going to have to go with Dark Eldar on this one. I enjoy their lore more so then the standard Space Elf, and of course because they would be a good dark counterpart to the Eldar. I'd say it's to early for a Necrons or Tau addition because they'd be very OP at the beginning and no to the Guard well because we need more non-imperials.
I really like the Imperial Guard, but I think the Tau Empire is the most logic option. Every faction has it's objectives, motivations, etc. In this case the Imperial Guard and the Space Marines fight for the Imperium of Man both. Necrons are all the same and Dark Eldar are unliked by me. In any case, Tau Empire is the most efective option. With all his lore is more diverse and depth of any of the other options I think.
I've gotta vote for necrons on this one. I just wanna see robot zombies come out and try and kill us all.
You just want them because they'll keep coming back that way you can repeatedly smash. DON'T THINK I DON'T SEE THROUGH YOUR ORK WAYS.