*walks in, rolling a keg in front of him. Stops at the sleeping naga and looks at the questions*
Well, all the main characters that were shown as more than standard background cameos and screen pictures, we had permission to use... and at least in one case we obtained the permission AFTER we used that character
Cameos shown on screens, as prisoners or in on the battlefield, we generally did not asked permission for (it would have taken ages to obtain them all) but used them under the Ruled of Tribute, considering them homage to the comics they came from.
As for the ending, then it had been imagined in its basic form all from the beginning, before the Wars even started, it was just a question about getting there. And as Net already noted, lots have been changed and added underway, the draft script for the Final Battle were a LOT different from what was played out.
*checks the last question and notes that the Naga is still sleeping*
Yes, the Forum Wars came to be out of the blue as the Bunnie's reaction to the Overlords's surveillance on EGS was a bait & hook we just couldn't ignore...
But that's another and longer story...
The Squirrel Wars was always meant to be more of a secondary storyline, but it was also planned to be a more integrated part of the Crossover Wars than it ended up being due to a whole lot of chaos and necessary lastminute changes behind the scenes... a part thats almost a story in itself.
Still, it was integrated in the way that the storylines helped carry Scale's Bracer into the Wars, as well as interacting with some of the other established storylines.
*rolls the kef out of the panel, towars the sound of merry laughter*