Given how figurative Catholics generally believe Revelation to be, I may annoy them because of how literal my interpretation is. Remember, many Catholics don't believe there will be a physical battle between Satan's forces and those of Christ. That's just one of the ways they interpret parts of the ends times. Similarly, Catholics I've talked to recently about the War in Heaven believe it too is figurative.
I do actually follow the Catholic belief of no final war between Christ and Satan. Instead, there will be such a battle, but it will be between Connor's forces and those of Satan shortly before Christ returns.
Besides, to write the ending I want for the trilogy, the lake of fire has to be a portal to other worlds where mortal sinners are scattered to "punishment" worlds. The greater the sins, the harsher the world. And since all these worlds lie"within" the lake of fire (ie behind the portal), and since the mortal sinners can never leave those worlds, they are in effect in the lake of fire forever.
The remaining humans got to Heaven, where they will dwell with God forever. Before God leaves, he tasks Connor with ruling those worlds, not merely as their king, but as their shepherd. He is to help those people become increasingly holy. There's a lot more to it, but a key reveal by God to Connor is that everything Connor has undergone in his life has been to prepare him for his ultimate role (King and Shepherd).
Connor asks him if he'll ever get to Heaven, and God smiles and tells him that the Father chooses his champions wisely. In other words yes.
