I'm not sure but I think the only new bounties will probably be Sanji and Usopp, because it was because of Sanji that the whole whirlpool thing started allowing the Mugiwara crew to escape. Marines will probably find this out because Sanji left a calling card like "Your just desserts from your favorite 5-star chef." And they'll probably find out that he's a cook from Wanze, the ramen-freak, I mean Sanji did single handedly destroy an nearly that entire train full of marines, and they had to have some cameras in the Government facility.
Usopp or rather Soge-King will probably get one because it was directly his fault that Spandam couldn't get Nico Robin to their destination in time.
Come to think of it Franky might get one too…...... but he might be exonerated because the WG directly attacked Water 7 and could exempt everyone involved as a way of apology for the actions of Spandam.
The reason I believe that Nami and Chopper won't get bounties is all they did was fight and defeat a bunch of people........ the same thing took place in Arlong Park and Alabasta but the only ones to get bounties was Luffy and then Luffy (higher bounty) and Zoro.
What Luffy, Zoro, Sogeking and Usopp did was directly confront the government and did something that obstructed their "justice" and helped a dangerous criminal escape. The only thing Nami and Chopper can be considered are allies, probably the nameless pirate A and B (a bit of foreshadowing on Oda-sensei's part maybe).
Well all Luffy and Zoro did was fight too, but they defeated the strongest CP9 member and the strongest swordsman of the CP9, so this is bound to raise their bounty. Robin's too.
Somebody might have said something like this but I'm not reading 40+ back pages to find out.