I would say having the norse god of vengence would be really cool in my opinion, his origin would be from the remains of Ymir (the ice giant that created well the whole world) and thats why he would get the titel "The God of Vengence" and he would be shown at the end of GoWR and Vidar would say "Bring me Odin" and then it cuts to the credits of GoWR.
I might make a page for Vidar if i get to make a fanmade page