What if the two(2) lost Primarchs from Warhammer 40k crash landed on Azeroth specifically Stormwind 10 years before the 1st War took place? How would the presence of literal demigod mortals affect the orc invasion?

Warhammer 40k cosmology and Warcraft cosmology are combined

I wont go into a full explanation, but let us assume that the magic system or concept in Warcraft blends in or coexists with the magic(Warp) in Warhammer 40k. Non human beings especially the titans, old gods, aspects, wild gods, or any divine beings are still considered divine. All humans in the Imperium are far off descendants from the humans that came from the Vrykuls because during the golden era of humanity, Azeroth was once a colony before they(WH humans) were kicked out from Azeroth after a long time by its inhabitants.

All Primarchs created by Big Emperor himself have the potential learn and master all kinds of Warcraft magic given enough time and training.

Both Primarchs land on Stormwind and are adopted, raised, and trained by Anduin Lothar himself.

How would the Wrynn family react to the Primarchs serving as warriors for Stormwind?

Would Stormwind even fall?