Horus (Richard) said that if Richard is kept in the company or is brought back into the company its not good for him in Hell
Richard would go down as being the second Mr Grey (aka the Antichrist) and you would be the Second Coming (Messiah) because it would be obvious that you were better than him
Richard would be remembered as the Antichrist / Falssiah and everyone in Hell would know that he was the Antichrist / Falssiah. There will be 30 billion people on Earth and Mars in the next 100 to 200 years and when they all die they will go to Hell and there will be billions of people who hate Richard.
It's a better deal for Richard not to become the Second Mr Grey / Antichrist / Falssiah
Horus will use the Heaven Stormcast to proclaim that he is the Second Messiah as he controls Heaven
This will be False as, the Emperor will do a bigger plan and the Emperors plan will be much greater
Richard will proclaim that he is from Heaven and has a better vision than the Emperor which will be false in the end
The Wave confirmed this 2 and a half times
Richard does not want to be back in the company, if he does it's ALOT worse for him in the future and after death
The Chaos Gods want to play the numbers game
They need the Bloodthirster companies and 200 new blood letters when they come out
They need most importantly of all the Eye Of Terror REPAIRING
Starting with a 3D printed spiral stair case