4th kazekage is a watered down version of gaara.
3rd raikage is a slow but stronger version of Ay (he's just basically tsunade right here)
2nd mizukage is basically mei with some genjutsu and possibly weaker suiton..
2nd tsuchikage is basically oonoki. Might even be a watered down version of the old fart, as he has so much battle knowledge and his willpower was what even beat FTW...
Kabuto(as a medic) Isn't much use as tsunade had to stop medic and actually fight.
Hashi still wins. This is no diff from fighting the currect kage. The only new thing is genjutsu, but they just lost the only person to willpower out of FTW...
4th Kazekage: Is he really a watered-down version of Gaara? Gold is denser than sand and can be formed into sharp weapons, his ability at it's core is magnetism which means that he can use all metal against you; fighting him in a village is basically a death trap.
3rd Raikage: Possibly slower and stronger, but is also almost indestructible and possesses Hell Bringer Hand and Black Lightning jutsus; a known one being Black Panther.
2nd Mizukage: Think of him as a more powerful version of Suigetsu. He has Hydrification, Water Gun, Jokey Boy, and an Izanagi-like mirage. Like Suigetsu he should have a myriad of uses for his Hydrification ability: Strong Water Arm, Demon Fish Wave, Drowning Bubble, etc. Also, he should be impervious to all but Raitons and attacks close in power to a Bijuudama.
2nd Tsuchikage: Has Jinton and flight like Onoki, but is also an incredibly powerful sensor and can become almost completely undetectable.
Kabuto: Has Orochimaru's body-mods and snake-based abilities, also has the abilities of the Sound Five and Team Taka. He also has medical ninjutsu, suitons, as well as Sage Mode, White Rage, and Inorganic Animation.