God fist
Yeah Ame already said that the last of the new fields are being planned and there just aren't enough for each legend to have its own field.
And as for Elite 4, its probably going to be Bennet, EL, Heather(what else could she be really, other than maybe the back up dragon gym leader), and anna. Arclight saying that the only way to join is to beat the league probably means that he's champion. Just hope that Lin isn't actually an elite, it would be very unusual to have the leader of an evil team as someone with so much influence already.