If I read into the “universal humanity” statement a bit, it certainly sounds like there will be no Elonian specific expansion/content as well. I would like to add my 2 cents on why this is a terrible idea.
One of the best things about GW1 was the feeling of massive world exploration. I really enjoyed the different aesthetics and back stories of all the different places you could visit. If the players are all stuck on 1 continent in GW2 and the only new maps we ever get are just filling in the current world map, this will be a huge disappointment to me.
I will not buy any additional content that does not return this feeling of exploring other continents.