I was watching an announcement reaction video on YouTube this morning and an idea struck me that I've never seen speculated on. For the longest time there has been speculation on a connection between the Norn and Kodan. That the Kodan could be an offshoot of the Norn but in permanent (Polar)bear anthropomorphic form.
What if the Charr are offshoots of the Norn also but in a anthropomorphic form between Norn and an animal we haven't seen? Some kind of furious horned cat which had a spirit that taught them the form long ago and the first Charr made the form permanent. Their origin could have been lost or just not spoken about with any outsiders.
What could this mean for the story if it were true? It would make the sort of relationship between Rox and Braham more interesting. If they are the same basic species; they could possibly have a child if they ever acknowledged their feelings for each other. Their offspring might be a child that can change between Norn and Charr form.