Sunrider: Liberation Day OST - Crow's Theme (inofficial title)
I realized, that this OST is nowhere to be found, neither in your game files nor in the integrated music box in the main menu. Since I didn't want anyone to miss out this menacing theme, I've recorded it straight from the game.
This tune plays in the post credits scene, where crow shows up from the past and declares the rebirth of the holy empire in the present universe. What a cliffhanger.