We know that the WG is interested in Raftel, or keeping people away from it at least…
We know a lot of pirates are interested in Raftel, duh!
The rev army seem to know a bit about Raftel, just Kuma and Sabo is getting tied into it a bit…
My Theory is that there will be big grand battle in Raftel and the way the SH win is by acquiring the Imu killing button and then stopping other eeeeeevil pirate crews, and then having worked together with the marines there may be an alliance or a retreat.