- The book starts roughly 100 years after the Heresy - with the death of a Primarch. Guilliman vs Fulgrim, finally written down to enjoy.

- Thiel became Captain of the 2nd Company of the Ultramarines after the Heresy!

- There are now Tetrarchs again in 40k.

- The Sisters of Silence see Guilliman as living saint - they are glad he is back and they worship him.

- When Guilliman spoke with the Emperor during the gathering storm he was shocked how his "father" really sees him - not as a son, but a tool. So yeah, this builds up on the MoM story line. (I actually skipped quite to the end of the novel for this one).

- The Emperor's humanity is all but gone in 40k.

- It seems like Rowboote isn't really a fan of the Primaris Marines - he calls them even "Cawl's blasphemous hordes".

- He only sees them as a tool (atleast for now).

- It's also implied that he actually is a psyker and tries not to use his potential because of Magnus' censorship.

- He still thinks in practica and theoretica :)