It fits with the time frame of codex releases, the lore has set the stage for his return and he's a completely different general and warrior from Guilliman which makes for a nice contrast between the two Imperium heroes.
What's the relationship between the two. How would Russ react to the Imperium, and more interestingly; how will the Imperium react to Russ?
We know Guilliman saw Russ as one of the dauntless few. A commander so reliable and dependable that any war could be won outright with the support of him and his forces.
We also know that Russ sent a pack of warriors to keep an eye on Guilliman for any signs of treachery after the outbreak of the Heresy, so perhaps the sentiment isn't shared.
If Russ has mutated in a similar fashion to the Wulfen how will Guilliman and the Imperium react? What will the ecclesiarchy say when a vaunted Saint of legend appears as a mutated beast? Will Guilliman defend him from the more zealous elements of humanity? I personally believe that he would, as long as Russ' faculties were unaffected.
We know that Russ doesn't take orders from Guilliman. He ignored the Codex, but never challenged Guilliman in his position as Lord Commander to my knowledge.
Is this, in terms of story, the easiest return? Guilliman the statesman, Russ the warrior?
What direction could this take, and what would you like to see from GW?
*Edit* Fixed Typo
Edited by Ishagu, 05 December 2017 - 09:54 PM.