So, from what I got from this chapter, after the war, Jinbe returned to Fishman Island but, since he lost his Warlord status, the discrimination was too much and he went into exile with the original members of the Fishman Pirate. This probably lead to the creation of the New Fishman Pirate. Brilliant.
I didn't come to the same conclusion about Jinbe.
Keimi seems to indicate that since Jinbe lost his Warlord Status that he and and everyone associated with him had to leave Fishman Island. The pressure most likely came from the World Government ala the Marines.
In general, I think Jinbe's message is going to denote another meetup spot in the New World.
Also, I would not be surprised if Jinbe has joined forces with the Whitebeard Pirates.