Notice the “Load Prequel” in this fake menu presented near the end of Saints Row IV?
That was not the only hint dropped in the end game to point at a potential prequel. There is something said in the ending cut scene that now leads me to…
When you finally kill Zinyak, you are told that the world was destroyed and there really is nothing you can do to change that. The Zin Empire does however have a time machine and they can send you back to change the past.
I am just going to throw it out there and say that The Boss will need to go into the past to make sure that he/she is born because a mysterious time traveler is trying to end the Saints by starting with the leader! A return to Stilwater, see the world before the Saints were big and save the future and humanity by saving yourself? Rev up those Dr. Who and Back to the Future jokes Volition!
Again, that is simple speculation.
Since the third Saints game, there have been a ton of movie, music and games preferences crammed into them. The idea that they would joke about a prequel seems just as likely.
The only thing we can do now is wait and see folks. Keep your eyes open and ear to the ground for more and hopefully we will find out sooner than later!