Oda does random shit all the time, but even for him it doesn't make sense to make us return to Egghead after like 10 chapters away from it just to shift the focus again when it gets hype. if he was going to focus on Akainu it would have a been continuation of chapters away from Egghead.
So either Akainu is heading himself to Egghead, or the frauds are overblowing something trivial again