Eureka! I think I found it!
All right, this is my idea:
A total turnover for mordheim: game will be set in a pre-sigmar/rightwhensigmarwasborn time.
The world is totally uncivilised but for Elves and Dwarfes. Men aren't united yet and there's nothing like the empire or bretonnia: they are all marauder-like. The expansion will be mostly based on different human-type warbands, Orc and Goblin barbarians and Dwarfes and elves. The existent cities have been all destroied by the wars between elves and dwarfs, therefore the settings will be:
-Ruined cities (mordheim-like but very old)
-Human rural villages
There will be a wide range of human-like warbands that rappresent both how the few humans present in the old world gather together to survive (or to defend their homes) and the options of gods/civilisations that were starting to rise.
Examples of human warbands:
-Farmers/warriors of a village, lead by the village chief, two strong-men, a 'healer' or something and the chief's son maybe?
-Groups of robbers/pillagers who are actually relatively "good" but have nothing more to loose and therefore pass on the 'bad side? maybe lead by some chief, a good archer, a dog teamer and a skilled robber/assassin?
-The very,very,very first Sigmarites: they saw the comet and feel, no KNOW, that the ONE is born. They are looking for him in every village and HATE orcs more than all. Maybe lead by a Warrior priest-like character and two other cool guys who are filled in by the poewr of some god but with very bad henchmen?
-Humans who leave in forests, in small groups but have learned, through a mixt of taming and magic, to make wolver, bears and other animals do their bad work ;P
-The first Chaos warshippers, who, n the worse desperation beg for help to the sky and get answered from one of the Chaos gods? I'd do specific warbands with quite different styles per god... Another option I thought of is the one of having Demoniac warbands in which a group of easely corruptable humans get approached by some lesser deamons (like Bloodletters, Daemonettes, Plaguebearers or Pink Horrors) sent by a big one to begin his corruption of the old world?
-Orcs and Goblin primitive warbands with fuhrs and all.... And maybe, referring to a passage from the 6th edition rulebook -"They came from the far east, sloughtering and reducing in slavery the human kind..."-, have them be able to enslave their prisoners and use them as very poor free henchmen in they have a particular kind of hero?
-Bands of awful beastmen, which are here Waaaay more powerful than in the original mordheim as other warbands will be worsly equipped and all, makig their natural streanght and toughness just great!
And more if you can think of
I wouldn't include elves nor dwarfes as whole warbands as they have ended their conflict for the old war long ago and plus they would be way too strong... they will be included as hired swords though....
other hired swords will be dark elves, chaos dwarfs, lesser deamons and more....
Hired swords are here crucial as, to represent the rarity of actually good weapons, the fact that the warband includes a hired sword dwarf, for example, will give the player the option of equipping a hero with a powerful hammer or axe etc...
Iron Weapons are rare, to represent this, the streanght of armor is way multiplied but has some better effect (eg you can modfy your d6 throw of +or- 1 when rolling for injuries after battles) other than the normal armor effects. Also weapons such as swords and axes are rare. common weapons will be primitive spears, knives, wood axes, hammers and other kind of maces. Bows are quite rare but not much... I would represent this by letting only heroes be equipped with certain types of rare items.
Tell me what you think and if you like it well, than, let's get working!!