Lucario of the Gods/Fantasyverse - Empire of Man?

So, I have had some thoughts into the Fantasyverse recently. What do you people think, should we have a collaberative Empire of Man in the Fantasyverse?

The Idea
Basically what it says on the tin. A large, collaberative empire consisting of humans and (maybe) some sub-humans. My idea for them would be that they are an empire bent on ruling over the lands of Koldenwelt for their ruler(s), and are xenophobic of the other empires and races on Koldenwelt. They would possess gunpowder, cannons, cavalry, etc.

They would be collaberative in terms of fiction, and would be based mostly on the empire(s) of the past. They would be a big empire, not needing the usage of allies, though it would help. However, they would most likely only accept the help of dwarves and some races of elves.

Of course, this could change over time, seeing as its collaberative.