At this point, all I'm really hoping for is them not romanizing Kerudio. It'll most likely be Keldeo in English, and I suppose I'm only against the idea because I'm too used to seeing "Kerudio" all the time...
Kyurem, Landros, Voltros, and Torneros will likely remain unchanged as well. Actually, now that I think of it, Meloetta and Genosect should also not get changed. Everything else... eh.