Is Kizaru coming to Egghead to kill Vegapunk or to save him? Or just to deal with Luffy and co.?
So most likely to deal with Luffy & co.
CP-0's mission is to assassinate Vegapunk.
Honestly, Strawhats together would clap Kizaru.
Even M3 alone would clap his ass. Adding even Jinbe to it is overkill.