What would happen if Sunset Shimmer never went through the portal

Thank CloudyGlow For making the cutout of the confuse the Fluttershy https://www.deviantart.com/cloudyglow... Thank MLP-Silver-Quill For making a background https://www.deviantart.com/mlp-silver... Thank 90Sigma https://www.deviantart.com/90sigma/ar... Thank Zacatron94 For making the cutout of Celestia https://www.deviantart.com/zacatron94... Thank StarryshineViolet For making the cut out of this background Pony https://www.deviantart.com/starryshin... Thank Death-of-all For making a background of Ponyville https://www.deviantart.com/death-of-a...