I can see him forming a little group with vegapunks, Bonney, Sentomaru and If he survives lobotomized kuma throw in the seraphim and pacifistas and this group would be equivalent to a yonko crew
He didn’t join Dragon because the Revolutionary was broke but this isn’t the case anymore.

In vague timeline? We can see how Kizaru held back because he had a special spot for Vegapunk, Sentomaru, Bonney and Kuma. This could also explain why he held back and trolled around against Luffy in Saboady, Marineford and Egghead because he is either a Revo undercover or still see Dragon’s as a marine friend.

I’m sure they will all re-unite together in Egghead because of this panel.