Will there be a Super Luigi Odyssey Mod Speedrun?

Probably not.

mods are banned for this game. if you want it to be a seperate game on src, you can try submitting it here.

Maybe something like Luigi%? Like getting golden balloons in luigis balloon world or getting the luigi costune?

I can see getting all gold balloons, but probably not Luigi outfit

try yourself the speedrun and see if you like it! if so, you can share it in it's place in the discord server and consult this post https://www.speedrun.com/smoce/forums/ze0h9