The raibow kingdom

Once apon a time there where 3 alicorns. Celestia, artemis , and colors. They brought peace and order and made everything better. That is until prince artemis heart grew cold from all the ponys loving the sun and not the moon or so he thought. Colors the princess of colors loved artemis with all her heart but he never understood she loved him and his magnificent night. Until it was to late and artemis became nightmare moon. And was banished to live a thousands years in the moon.

Until he returned. Will he be able to show colors his true feelings and love her? What happens if there's another alicorn who wants colors powers?