Think his bounty has gone to 5.247.600.000B, a 3B increase for whatever he have done. Putting he above WB, but bellow Roger, that only Luffy will supass.
For what he have done, i believe is related to a Ancint Weapon, he have a good historial knowladge and could have understanded what the WG was after by the news(especially the one related to Alabasta), and that he have killed Kizaru in process.
That would put him as a threat again for final villain before Laftel, and would put Luffy as the underdog even after Nika powerup.