I read that new maps cost too much to make just new demigods.  we probably won't be getting any new maps.

The problem with custom maps, if I understand it correctly, are the file formats in play and the respective licences one needs to purchase to have the software that can export/import them for use in Demigod.

cant believe that new maps cost too much

Frogboy mentioned in former days that a new DG costs much much more than a new map !!

GPG can also save money by using the existing 8 texture-styles and backgrounds from the old maps.

so the only thing GPG has to do is to create a "new model" and put old textures on it (for example the cataract textures/background),

that should be easy for pros !

From the Sept Q/A - http://forums.demigodthegame.com/364502

Q: Will there be new maps being added to Demigod?

A: We think so.  Stardock plans to work with Gas Powered Games to either create new maps there or have Stardock create them.  In addition, we are hoping the modding SDK (which is part of the v1.2 update series) will make it possible for users to create maps.  However, making maps is not easy. Unless you have a very good understanding of 3D Studio you will want to leave it to others.

I think I also read somewhere that we might just get modified versions of the existing maps with different tower locations, portals, etc.  No real eta.