I'm pretty sure Kinguin announces himself as Dread Mage every time he goes to any social function, or when working in his unofficial capacity as a pirate. Athco largely just roll their eyes at him; Mage Jim gets a dose of Mjollnir.
As for the city management game, yes, it begins as soon as the gates slam behind Atheme when he leaves for Arkalen prior to the Vaelius novel. The game is called "I Am Empor!" Will Kinguin be a benevolent dictator, or a ruthless despot? You decide! Plays largely like Sim City, only the city is prebuilt and most of your toolbar is various natural disasters. There will also be action levels interspersed where you must either conquer Itrius, or quash rebellions, depending on play style. A secret ending will involve the creation of Mobile Castle Felthespar, who will be fully playable on NG+.
"It's either 'your mom' jokes or me."
"Then I, like so many men before me, must reluctantly choose your mom."