Well it is said that 13th Dark Crusade will be the last one , cause almost all legions are gathering to war , in alst novel Iron Warriors will offer theirs aid to the Abadon , probably Perturabo will open again an a warp portal , + Night Lords , also are gathering in 1 legion warbands are getting united , something great is coming , probably Cadia will fall.
Actually, a lot better - The Dominion of Fire was a complete success by any standard. Seventy sectors in flames, 4 SM chapters devastated, 2 Titan legions lost and more than 30 IG regiments completely wiped out during 2 centuries of constant warfare. All at the hands of 50000 berzerkers and one Daemon Prince... Maybe the most successful incursion post-heresy. As for the First war for Armageddon - the tendency for Grey Knights to Deus Ex Machina whenever GW get tired of coming up with decent plots is well known. Even then, 109 Grey Knights dead before some GK recruit manages to break the Black Blade and only 13 Gk survivors... You can't deny that Angron gets things done!
2nd to Horus. Maybe that is true. But didn't Horus himself not only get destroyed, but down right extinguished?
Well that recruit as we know is Giperion or (SPOILER) we know his second and real name , so that is possible for him , his psycho powers are well known . He is an mirror.
Creed wins. "But Creed wasn't in it!" You say? His Titan would like to disagree. Because Tactical genius.
Black Raven can cut arm off Ork with just a glance, Anything stronger than Ork can crush him however.