Shoujo Kakumei Utena, Go! Princess Precure Recommendations
Along with referencing another Kunihiko Ikuhara series (he directed several seasons of Sailor Moon), there are many subtle references and homages to Utena in Go! Princess Precure, though ONLY aesthetically - ie, character design, scenery design, camera angles, etc. If you've seen Utena, it can make noticing these references very fun.