Wow. Just got up n saw the chapter. HOLY SHIT!! Sabo n Koala?!?!? I mean, Sabo alone would've been enough to make my day, but Oda had to throw in Koala as well. Well played Oda… Well played.
So as we thought, (well.... Most of us anyway), Sabo is with Dragon. Honestly didnt expect Koala as well, but should've seen it coming actually. And this is why I like Oda's writing, he doesn't bother making the "mysterious" guy's identity a cliffhanger. He knows the reader would instantly get it so he goes straight to the point. The mystery only revolves around what he looks like now.
Btw, when would the last chapter be? For this year, I mean, before we get the new years break.