Royal Siege Machine
In the battle for Vladek's Ankorian Fortress, the Morcian Knights used two kinds of siege towers (and various smaller weaponary). One version already appeared as a set (8875) in 2005 while the other one only appeared in the comics. This one had a higher drawbridge but lacked the battling ram and also had some other, minor differences to the set.
I tried to rebuild one of those Siege Towers as close to the comic as possible, though they were usually only featured in the background, thus lacking details.
The Set would include King Mathias and a royal Knight.