I've been pondering about this for a while and now I feel the need to share this: is there any islands between Fishman Island and Mariejoa?
As we know, Oda stated that Fishman Island is the halfway point of the Grand Line. Likewise, Mariejoa is located on the Red Line and is the only other entrance and exit to the Grand Line besides Reverse Mountain. Unless you have a ship lined with sea stone to cross the Calm Belts, of course.
Basically, will the Straw Hats end up going straight to Mariejoa from Fishman Island or will they come across other places inbetween them?
From what I understand, Oda hasn't made any confirmation of this yet so we won't know until it happens. I really can't wait for this to be clarified!
One other question: how do pirates from the New World cross the Red Line? I doubt they go through Mariejoa, but maybe they have a means of transversing Reverse Mountain. If only we knew!