What is the purpose of the new Primaris Space Marines, and what is the state of the Imperium as we roll into 8th Edition. Check out below to see.
via Warhammer Community
https://www.warhammer-community.com/2017/05/16/new-warhammer-40000-the-dark-imperium-may16gw-homepage-post-4/
Developed on orders from the Primarch Roboute Guilliman 100 centuries past, Primaris Space Marines have been diligently developed and perfected by the priesthood of Mars during the long intervening millennia.
But to what purpose?
Perhaps an optimist, but never a fool, Guilliman learned from the Horus Heresy, and he foresaw that the forces of Chaos would never relent in their aim to bring the Imperium low. He anticipated that devastating times would once again engulf the galaxy and knew that warriors resilient enough to stand against them would be needed as never before. That time has surely come.
As the Imperium literally comes apart, and the forces of Chaos run rampant across the galaxy, Guilliman launches his Indomitus Crusade. We’ve heard that name before, but what does it mean? The new Warhammer 40,000 has this to say on it:
“Roboute Guilliman gathered his new armada. Along with elements of the Adeptus Custodes, a small contingent of the Silent Sisterhood, and a vast war host of Primaris Space Marines from many newly founded Chapters, the Primarch set a winding course. Strike forces from over a dozen pre-existing Chapters of Space Marines, led by the Imperial Fists, joined the fleet. Thus began many new legends as Guilliman travelled to aid beleaguered planets, breaking sieges and sweeping away invaders to bring hope back to the desperate defenders. It was not long before word began to spread, as all those planets that could receive astropathic messages hailed the return of a hero out of myth. Once more, one of the demigods of the past fought for the Imperium of Mankind.”
So, that sounds pretty promising for the Imperium.
Well, maybe. The scale of the task is monumental. Following the emergence of the Cicatrix Maledictum, no world in the Imperium has been untouched by war, and there are many thousands of planets that cry out for aid and reinforcement. And that’s on the Terran side of the Great Rift!
Travel through the Cicatrix Maledictum is all but impossible, but sporadic contact has been made, through temporary warp-routes, to a few of the best-defended worlds on the other side – and things are not looking good.
On the far side of the galaxy-spanning warp storm, things have quite literally gone to hell.
Amongst the besieged Imperial worlds in this Dark Imperium are many Space Marine Chapter Planets, including Baal, home of the Blood Angels. Things were already looking pretty grim for the sons of Sanguinius, with a hive fleet closing in on them, and now it looks even bleaker. Cut off from the light of Terra, the Angels and their Successors stand against the might of Hive Fleet Leviathan, hoping they can withstand the storm.
Yipes, the Blood Angels sound like they are in trouble. This isn’t the first time they have triumphed against impossible odds though, can they make it out alive? We’ll have to see.