Fifty years in the future, a large invasion of monsters lead by one pony, causes a wormhole that is used by the Masked Rider Den-O to allow the salvation of ponykind, by sending through the Terminal Belt to be claimed by five colts whom will carry on the legacy. Read the notes please.
~~~Note~~~
This is not based entirely off of the canon story of Kamen Rider Den-O, this is sort of an alternate universe where Den-O already exists in Equestria, and the main character Imagins and other characters are already ponies, sorry if you are expecting something besides this.
P.S. It has been a short-lived return, but I have been caught up in other real life business and cannot update this story for a while. My most sincere apologies.