Kidd and Law comeback
Kidd obviously being washed away at the shore of Elbaf is really close to where everything is going down, the holy knights have metalic hearts, it's all set up for him to come back soon, I don't think he'll do a lot against Imu, nor do I think Zoro or Sanji does a lot vs Sommers and Killingham, this arc is set up to be a huge straw hat loss. Gaban just said the crew needs to leave, I think what will happen is everyone will get overpowered, Usopp will have his "I must sacrifice myself to save the rest" moment, Kidd shows up (who might even have met Shamrocks before due to his hatred for Shanks?) and sucks the holy knights into him and drowns himself to sea or something letting the straw hats escape.
Now there is still Imu, I don't think you can outrun Imu, even though it has happened many times before, he is 3 forms ahead from where he was the previous times.
Law and Bepo have nowhere to go, Egghead is destroyed, Wano might be an option, but I see them running into the red hairs ship.
Shanks entrusted Law to save Luffy during Marineford so I think there would be a mutual "respect" for the two, I think he tells him about what happened and they eventually reach elbaf and room saves the straw hats or shank's haki or something idk
Shanks meeting the straw hats would make sense since he now wants to "claim" the one piece when Nika returned, maybe only Nika can claim it?
I think over at the holy land, the revolutionaries are close, passively weaking them, I think blackbeard is close (at fishman island) It'd be a race to be king of the world vs king of the pirates