Ooh thank you so much for this. I've been keeping track on the issue!
Basically, I agree with what was said. The lore will be modernized as most of Talon's lore and purpose was linked to his 'joining the League to find General Du Couteau', followed by the last Journal of Justice entries (around issue 27), where he effectively investigates the case. Here's a somewhat detailed summary of the conspiracy. [x]
The Institute of War is gone, and Noxus has a new setting, the High Command is now the Trifarix and according to the snippet released last year for his lore, he currently takes orders from them.
Talon's loyalty and obsession with his 'cause' are basically the core of his character. Without that, he isn't the champion we know.
Hopefully, we will learn more about Du Couteau's fate and his situation before disappearing. I think the powerplay between Swain and LeBlanc will be a key factor in this. Was Du Couteau a friend/supporter of Swain? Or was he somehow sided with LeBlanc?
We have some quotes about this, Urgot states "I hope your father begged when Swain betrayed him.“ when taunting Katarina.
And then Swain going "Do they know who killed your father, or do they still blame me?”
And the most confusing one, Swain to Katarina "He asked her to do what she could not. To kill me.”
In summary, my guess is the_ modernization_ of the lore will be something like "Talon accepting to work for the Trifarix to discover the shadows responsible for Du Couteau's fate." Either as a payment for his blades (this would lead him to be a sort of mercenary who gets paid in favors/contacts/information instead of gold.
Or, working for the Trifarix under the conviction he knows he is now serving Noxus in the same way Du Couteau had, to honor his name, finding a new purpose there. This would sort of imply the General's death has been cleared.
I honestly prefer the first one.
PS: Lewanor, I know you are in the R/ Talonmains (I'm there too, I remember we went into the Swain AMA asking about this :B)