So we know how the fight goes in canon thanks to the "Warzon: Ultramar" section of 8th Edition.
During the final battle of the Plague Wars, the Ultramarines attack the last Death Guard Stronghold in Ultramar which is the planet of Iax.
Guilliman and Mortarion "fight each other to a standstill amidst the ruins of Iax" (exact quote from the book) when Mortarion decides to "withdraw under the cover of a virus bomb" as the Death Guard pull back to defend the Scourge Stars that had come under threat due to the "War in the Rift".
Since Guy Haley is going to do more books following Dark Imperium, how do you guys think the fight between Guilliman and Mortarion should go? Should it be like the one with Magnus where Guilliman is on the back foot until an external source comes to aid him? (Such as the Ynnari coming in with the stolen Hand of Darkness). Or perhaps a more even fight where they are truly matched without any outside interference.
Side note: Is one virus bomb enough to destroy a planet?
Edited by Caius Tadius, 06 July 2017 - 04:10 AM.