Yeah kind of. I'm fairly intrigued by the mysteriously shadowy people. I feel they may be new villains, and not just part of Aether.
In general though, I wasn't that excited for USM for a couple of reasons :
1) Back to a third version so soon, that to dual games instead of a single didn't sit well with me.
2) Personally, I didn't like Alola that much. I can appreciate that GF tried to change the gym formula, but Trials and Grand Trials were decent, but still not as good as gyms imo. But more than that, I disliked the Alola region itself. I found it too small and bland, and the whole game felt like one giant tutorial, with stupid unskippable cutscenes.