Doubt that Kid and Law will break the 2b range, they defeat BM, but they arent close to what the Stawhats, Redhair or Black Beard pirates can do, they can be individually stronger than the first commanders of a Emperor, but they wouldnt be able to beat any empeor crew with theirs crews alone, or even any Emperor alone.
Luffy after defeating two commanders, invading Totland, destroying BM castle, getting alway letting BM look as the loser side, being the head of the alliance between Sun pirates, Fire Tank pirates and Germa(at least to the world) and having more than 5000 subordinates, with captains with bounties over 300m under him get only 1b increase, i doubt that they will get much more than that.
Or even Teach, after eveything he have done in Marineford he didnt get a 2b increase, and probably only after he defeat Marco that his bounty have gone over 2b.
Most likely Luffy, Law and Kid bounties wont get as much as a increase as if they had fighted a Emperor alone, only crew vs crew. With Luffy getting more because he will defeat Kaido in a 1v1, and most likely will be seen as the leader of this whole allince, and already have influence, strengt, subordinates and territory enought to be consider a Emperor, so i could see he getting close to 4b.
Luffy after defeating two commanders, invading Totland, destroying BM castle, getting alway letting BM look as the loser side, being the head of the alliance between Sun pirates, Fire Tank pirates and Germa(at least to the world) and having more than 5000 subordinates, with captains with bounties over 300m under him get only 1b increase, i doubt that they will get much more than that.
Or even Teach, after eveything he have done in Marineford he didnt get a 2b increase, and probably only after he defeat Marco that his bounty have gone over 2b.
Most likely Luffy, Law and Kid bounties wont get as much as a increase as if they had fighted a Emperor alone, only crew vs crew. With Luffy getting more because he will defeat Kaido in a 1v1, and most likely will be seen as the leader of this whole allince, and already have influence, strengt, subordinates and territory enought to be consider a Emperor, so i could see he getting close to 4b.