Inspired by the 7 Warrior Priest battle in the new WD, I have decided it would be fun to do something like that for this little campaign thing. Here it goes:
Armies: Should be about 1000 points or so each
Chaos: May be lead into battle by Crom the Conqueror (see WD for rules). If he is your general, all other heroes must have Mark of Chaos Undivided. Also, a max of 2 heroes may be Exalted Champions.
High Elves: May be lead into battle by Eltharion. No other restrictions
Empire: May do all Warrior Priest army, if so, it may include both Valten and Luthor Huss as per the WD.
Orcs and Goblins: Up to 2 heroes may be Black Orcs, and 2 goblin heroes count as 1 per the limit of 14.
Wood Elves: No restrictions.
Lizardmen: No Slaans, although Kroq-gar may be used but takes up an additional spot for the max of 7 heroes. ie he is 2/7 hero choices. (May change this)
Dark Elves: No Assassins. No other restrictions.
Vampire Counts: Must be same Bloodline. No Wraiths but no other restrictions.
Tomb Kings: Must include a Heirophant but no other restrictions.
Dwarves: No restrictions.
Skaven: No Assassins and up to 1 may be a Warlord.
Bretonnia: As per original list in Rulebook.
No magic users allowed although heroes/magic items with bound spells may be taken.
This is just an idea and a first draft so be kind.