With the risen of the primarch release being right around the corner, Warhammer TV have revealed a few facts about Guilliman.
He is ballistic skill 6, strength 6, toughness 6, wounds 6, initiative 6, attacks 6, leadership 10 and has a 2+ armour save. His weapon skill has not been revealed.
Guilliman is a monsterous creature (character) and is unique (obviously).
Guilliman makes allies that are an army of the imperium re-roll failed morale, fear and pinning tests if he is on the battlefield.
He allows your army to use the Ultramarine doctrines along with any you already have (if you play ultramarines, you get 2 of each doctrine).
If one of these extra doctrines is used, all Ultramarines are affected.
His leadership cannot be negatively modified and he can re-roll failed deny the witch tests.
He has all of the Command traits found in the rulebook instead of a single warlord trait.
He wears the armour of fate, that confers a 3+ invulnerable save and if he dies, he can come back to life next turn on a 4+.
If he comes back to life, he has d3 wounds.
Guilliman's Hand of Dominion can be fired in the assault phase as a 24" S6 AP2 assault 3, rending gun.
Also, one of his melee weapons has a chance of becoming strength D.
That is all that has been revealed so far and I am super excited to field him!