Zoro isn't hitting 2b even IF he kills Kaido that would be crazy lol. Blackbeard had to raid impel down, kill WB, be the first person with 2 devil fruits, AND beat the remnants of the WB pirates (a yonko crew with Marco at the head) just to barely pass 2b and you think Zoro in one arc will go from 320m to 2.32b? I don't even know if Luffy will hit 2.5-3.5 after this arc lol