Artifacts in Heroes 5

Katrine, just because you can’t play as Dwarves doesn’t mean they don’t exist in this world. And that’s why the appearance of Dwarven artifacts is quite explainable. As for why there’s armor made from sacred dragons. Dragons can also die, and what could be more reliable than, say, a shield made from the scales of a defeated Black Dragon? And anyone who has that opportunity will be happy to acquire such an item.
And as for the fact that the world and heroes will be new, I think it’s been a long time since we could just accept that. No matter how much people cry “bring everyone back!”, nothing will happen.