The only problem I foresee happening is this that the map would be too big (file wise) because you would need a gazzilion triggers. But then again, there an RPG (FF Dragon king?) that's 1.1 megs, and it's probably pretty efficient. I dunno, how much space would adding a 100 triggers take up?
But it's definitely do-able.
The nest issue that comes up, if its going to be four people playing four stories at the same time, is that timing is EVERYTHING. If I have to go save the troll because its part of my quest, but another guy killed the troll 2 mins ago as a part of his quest, then I lose before I even get to try. Also, if you've ever played FFVII full RPG, you'll know that it take years (like 20-30 mins) to get all the the players active
in game. This will discourage people from playing it.
If we have separate events, we have to make sure that they are synchronized. For example, make all the quest about 5 mins long max. Each player has five minutes to complete their quest. If they don't they fail. Regardless, they move on to the next quest.
The winners either level up, or get an item, or something.
For interest, you could make joint quests, were the lowest lvl people fight with the highest versus the mi range guys, or something.
This would work very well on War3, but is do-able on SCBW as well. I work on some storylines, and test out some balances issue with different units and battle systems.
But yeah email me about specifics and such. And if we can get more ppl, that would be great too.