Yes, the four Yonko were seen atop covering half of the double spread, while the other ones, including Imu, were left with the bread crumbles at the bottom. I guess after the Blackbeard Pirates and Red Hair Pirates are eliminated, the final battle will be between the Straw Hat Pirates and Cross Guild, since that's the pattern of luck Buggy had so far; starting in east blue, coming to grandline, becoming Shichibukai and then Yonko. His luck won't stop half way through.
Yep, you are starting to see a pattern.

Marineford also had all these figures present - Buggy, Shanks, Blackbeard and Luffy - the current 4 Emperors.
Blackbeard steals the prize and kills the big dog of the war and walks away.
All these factions will be involved in Mariejois war as well, for all of them to get something out of it.
Blackbeard his last DF while others will likely be there to obtain the last, 4th Road Poneglyph.
Not sure how CG will come last, probably some Buggy miracle works but RHP should drop out first, against BBPs and then SHs drop BBPs out.
Right about when they are about to go claim the One Piece, Buggy descends from the sky, paralleling sky descent in Marineford and says not so fast Mugiwara! It is a time for duel! I mean Davy Back Fight.
