Well, i finally have a name and almost complete story line for my epic campaign. it it now called the end of an era and is for PCs at least above level 2 in my consideration
Plot outline:
The Heroes recently traveled through a portal located in a dark elf hold. They were being forced to flee through the portal as they encountered a foe of which they knew they would never be able to beat it. in my case, it was a beholder.
the realm my players traveled through was the land of aventuria, out of a game called the dark eye (*tde) (in german "das schwarze auge"). we did that as we had a GM change and the other GM was more comfortable with the world of tde than with WFRP. we still continued with the warhammer rules, so it was fun to play.
you can supplement any world or realm with this, the only major thing is that there must be one great evil in that world. in our case this evil was "the nameless" the only evil "god" in that world.
the campaign strarts when the heroes return from the foreign world back to their homeworld
NOTE: THIS IS A GAME CHANGER. THE OLD WORLD MIGHT NOT BE THE SAME AFTER THIS CAMPAIGN
SPOILER: whatever the evil was that the PCs ecountered in the other world is a lost part of tzeentch, who had been thrown off a mountain long ago and splattered into a million sharps. it is basically the second half of the most poweful chaos god
if interested in my plot outline, read the following posts, they also include how my players played it!