Kid may not have much panel time, but in the few panel time he got, Oda specifically brought up important parts of his story
- Indicated to have conqueror haki in parallel to Luffy's and we know that Oda loves conqueror clashes especially in this arc with 2 Emperors, so it's likely it'd be brought up again
- Fought Red Hair pirates off-panel where he lost his arm, creating a build up between Kid and Shanks, who he originally already aimed at targeting once again with his alliance and Shanks is Luffy's idol, so could be used as a plot point in the Luffy - Kid rivalry even post-Wano
- Stole something from Big Mom after injuring an unknown commander, with Big Mom present in the yonko vs worstgen battle now, and thus giving the possibility for Oda to expand on it further
Hell he even took advantage of the occasion to rebuild Kid's hype by explaining why his perceived worth was affected by false rumors spread by the Big Mom pirates and thus with Oda allowing himself to show Kid's current worth without it necessarily being inconsistent
- He was regarded as one of the two stars of the Udon prison(with Luffy)
- Has even deeper reasons to hate Kaido, not only after his defeat that made his crewmates forced to work for him, but forcefeed his partner with a failed smile
It all depends on where Oda will aim with these plot points