Zoro won't. It will be perma scar like Oden did at best. Zoro will get the Kaidou to ground and out of Dragon form, Luffy is Beating Kaidou in the end.
For Zoro to Kill Kaidou, Luffy needs to perform a feat even better than that in Wano. In that scenario, same question could be asked about Luffy.
All his fights bar Im Sama will loose hype if he outdo something like even Killing Kaidou. Hence it can't happen. Luffy will beat Kaidou with lot help, ass plot reasons.
Anyway Yes if Zoro really manage to kill Kaidou, No will be hyped for Zoro vs Shiryu. Fans already wants more from Zoro than just beating King at this stage when he barely beaten anyone at YC tier. How will they be content with Shiryuu who then will feel like Pica 2.0?
Shiryuu is one of the major fights of Zoro, it needs to be more than just relying on Invisibility to be a challenge for Zoro. It will be awesome if this is just one factor of the battle and his swordmanship/ other skills also pose a good threat to Zoro.
If Zoro Kills Kaidou Oda needs to hype Shiryuu to another lvl/solid Top Tier. I won't say that's impossible but probably is redundant as SHs are also likely to face Admirals.
You guys having such big expectations, i am still on Z n S taking help to beat King n Queen solo in the end, lmao.