Three Power Ranger Villain-looking things have keyblades....and there's like, lots of keyblades all over the place...and that's all I remember.

No...I don't think it's Sora, because in an interview someone said the next installment would NOT be a numbered sequel, or an in-between thingy like CoM. So...That leads me to believe that the storyline will be completely different and possibly unrelated to the characters of KH.