Can anyone help me some with Dota2 Lore/Story?

Hi!

I have a group of friends who are avid Dota 2 players. We were talking recently and D&D came up and they expressed some earnest interest/curiosity. Maybe I'm being too ambicious, but I wanted to pitch a Dota themed campaign which I think everybody would be excited about.

Thing is, other than Dragon's Blood and the Dota2 Wiki (which seemed pretty light on story stuff), I can't find anything else about lore.

This puts a hamper on things as I'd basically have to come up with a fitting narrative from scratch, one that would make sense in the world as they know it. Any of you guys familiar with lore enough to throw some ideas/suggestions my way? Anything resembling a main questline or overarching adventuring goal they could work towards. Doesn't matter if completely fabricated if it fits the setting.

Cheers!