honestly that would've been really cool! i've always wanted a corrupted cure arc for precure but i doubt it will ever happen in the way that i want it to. dark sky technically counts but i wouldnt say that she was truly corrupted. but i think it would work great for nozomi because of how strong her sense of hope and justice is. it would be highly impactful to see a character like her succumb to darkness and be brought back through her love for her friends :)