It kind of depends on what state the World Government is left in after Elbaph's over. If Imu gets wounded or taken down completely, or if the situation in Mariejois gets worse again, they might be too busy to put out new bounties at all. Not to mention that Big News Morgans is still on the run with Vivi, so I'm not sure if they have a way to print and distribute new bounties at the moment.
...But, there's still Cross Guild and Blackbeard, out there. So, maybe Cross Guild will pick up the slack on the new Bounty front. That'd be a interesting twist. And it'd kind of start the process of Cross Guild slipping into the World Government's old role in the World early.