As I said, Oda might turn out to be reserving Kid's development for BM and it's certainly going that route with both aiming at fighting each other
While I doubt that he'd actually defeat her, he should certainly be at least end up giving her a fight and thus injuring her as a bare minimum
Potential wise he has conquerors haki and while he doesn't have the advanced form right now, as a conqueror, it's not impossible for him to unlock it mid battle to show his potential, why he has conquerors haki
If Luffy could get a hand of it after seeing Kaido do it, if Zoro can infuse conqueror haki in his attacks while being beginner in the aspect, it's not impossible for Kid to end up doing the same
Oda is clearly focusing on the advanced aspect of color of conqueror right now, so could be fitting in Kid's development to end up showing why Oda gave it to him
Furthermore I noticed that Kid's magnetism could completely contain Zeus power until it weakened, so it seems like he can mitigate thunder attacks and thus match-up wise he could at least counter one of BM's main weapons, while potentially waiting for more things he could do with his magnetism powers