I do remember being told that Weynard was working on a large map. I haven't heard any updates about it in months though. I decided I am going to do my own project. When relesed, Herocraft players will be able to play it. I've been studying quest development through MCEdit under guides and videos by the quest master Hypixel, The reason I can't claim that the giant quest I am writing, is specifically a Herocraft quest, is due to the fact that I am using a different build teams pre-gen map. 
http://www.planetminecraft.com/project/eldaria-island---custom-terrain-mc-10---end-portal/
 That link, will direct you to a map that is over 3000x3000 blocks of custom generated islands and terrain. Well, how do you plan to make a quest that spans the whole area, and how long will it take? Simple, the quest will revolve around the four horsemen of the apocalypse, and it is going to be a college project for me. So I'll just slowly eat away at it for the next four years.
 
If possible, I may requeset to the build team that they let me put Herocrafts name on it in some places, but it may be difficult to pull, but yeah just wanted you all to know I'm doing this in my spare time.