I mean, Sabo, narratively has business with Kaido. Sabo was someone portrayed as not only inheriting Ace' power but also his will. People even pointed out how he sounds like Ace. With Sabo having blamed himself for not being at Marineford. And even though Sabo himself might not hold a grudge against Ace' foes, we saw how, after roasting Burgess, Sabo said that even though he was going to forgive him, it seemed like Ace didn't.
Though Sabo alone would not be able to beat Akainu, especially due to the DF mismatch. So I see Dragon+Sabo teaming up as a good scenario, because not only is Dragon himself a powerful fighter, he could also amplify Sabo's fire with his wind. And thus, Akainu's portrayal would not be diminished, since Dragon and Sabo would prove a powerful combo. Stronger than current Law and Kidd.