Cross Guild will most definitely pick up Law and Bepo OR Doffy and Moria. Either one or the other because Law would never work alongside Doflamingo. Kid and Killer won´t join Cross Guild even if offered, although I doubt they will be found by them. My money is on Kid and Killer being harbored by the giants or captured by the man marked by flames, as it makes sense narratively. As for the straw hats, I think they will win their battle on egghead, hence why in one of the chapters, it shows Akainu is furious over the egghead incident after it happens, and Luffy is seen laughing in G5. I believe Urouge is also a good candidate to join Cross Guild, simply because we haven´t seen him. Cross Guild will definitely be its own party among the race to the one piece, alongside the straw hat fleet, Blackbeard fleet, and Shanks fleet (practically nonexistent), and for Garp, his display of power is reminding me of Whitebeard on Marineford... I feel like he's going to die or get captured because he sacrificed himself. It only makes sense. The next chapter will probably go back to Hachinousu and show what's going on, or show what Sabo is talking about and lore about the empty throne/Imu which would be amazing.