After the deal was made a large empty part of Valhalla was turned into a mini Pandora full of everything a Na'vi will need and in turn for them agreeing to this Eywa fixes their earth the plastic waste and trash islands all disappear but Eywa do warn them when they meet you not to be shocked by what they see then Eywa's voice disappears . Apollo being who he is wants to go in a blaze in his glory but Buddha stops him they know nothing about the Na'vi or how they would react to someone like Apollo and Brunhilde said that you would be coming to them anyway so all they need to do is wait.