Where is General Du Couteau?

So Katarina's father and Talon's master is missing. Will we ever know where he went? Talon came to the league to find him, so will he ever be a champion? He would be a badass assassin.

Kavyn spoke, but the voice was not his own: "Why do you want to join the League, Talon?"

"For General Du Couteau," Talon said. The sewer chamber began to fade to darkness around them. Talon felt the weight of his bladed cloak returning to his shoulders, the illusion shattered. "My search has led me here."

"You fight for yourself," said the summoner imitating Kavyn's form. "You have no allies. You kill to survive, yet you follow at this vanished General's heels like a dog on a leash. Why?"

Talon tried to wrench his arm away, yet he found himself paralyzed not by the summoner's physical strength but by some magical intervention. "I am in his debt. The General spared my life."

"Is your debt not paid? After you spilled the blood of the boy called Kavyn, you swore allegiance to no one. You killed without remorse, and while you killed for Du Couteau until the day he vanished, you may now have freedom if you wish it. Why do you want to join the League, Talon?"

"You misunderstand," Talon hissed. "In the slums of Noxus I killed to survive. Under Du Couteau I killed in his name, but my life was my own. Now--I am nothing, yet I still have my blades. What other purpose can my blades serve?"

-Talon's League Judgement

"When the general vanished, Talon considered reclaiming his freedom, but he had gained immense respect for Du Couteau after years in his service. He became obsessed with tracking down the general's whereabouts. Talon's suspicions led him to the doors of the Institute of War, where he joined the League of Legends in order to find those responsible for Du Couteau's disappearance."

-Talon's Background/Lore

If the General is ever found and made into a champion, I bet Hephastopheles would want to design him to make him similar to Talon since he trained Talon.