Ive taken into account several different things and can say with 100% certainty there is a new island, or even several new islands. GF is known for hiding stuff behind clouds until they're ready to reveal the area beneath them. This happened with the ORAS Battle Facility and others. And while this could very well be just another shitty Battle Island, I think it's much bigger, probably bigger than two or three of the other islands combined. If you look on the website the menus have the standard island trial symbol on them, with the addition of a large green rectangle underneath. This leads me to believe it's all a single giant island and not multiple islands, but I could be wrong. In addition to that, the new strategy guides for USUM are 130 pages longer than the original. BW2s guide was about that much longer than BWs guide. This means we'll be getting about as much content, but the current islands are too small to support that, hence the new island(s). You can naysay all you want and shit on USUM until it releases on November 17th, 2017 but I do believe we will be getting a game on par with BW2, content-wise.