If in a relatively short time Dagon could invade Cyrodiil, what could the other princes have been doing? Is it possible they could have had some interference in Tamriel that the Champion of Cyrodiil wasn't aware of, and if so, could we see their influence in later games?
For example, maybe while everyone was busy focusing on Dagon and his cronies in the main invasion, another prince came in his/her (its? ) full power and began preparation of a secret shrine. I have the concept in my mind, but I really can't wrap it around details. I need more time for imagination.
Feel free to correct, notify, or remind me of anything. I could be missing something obvious that absolutely rescinds my ideas.
Maybe you have some thoughts.