Kisaki has to have some implications in the whole time aspect, we still don't know why he was spying on Akkun's suicide and was about to correct Takemitchy before truck-kun came. We can assume that this next arc will be about finding out what that is. I can even see a big chunk of this arc taking place in the present now that our 2 damsels know about the time leaps. Also, Hanma, we still know nothing about him.
Now, about the "I'll even save Baji" speech. It's still too early to know of this is really foreshadowing, but pressing the "happily ever after" button in this types of stories is very common. I'm hoping that this show doesn't get a mediocre final act like all good shonens, but I've better lower my expectations.