I wonder how realistic it is.
It's their engine, so I think it is quite realistic if they want to do it.
Let me rephrase that: realistic chance of happening.
Like vometia said, they've stated they plan to support modding. But Swen has been pretty consistent their main goal is to first get the actual main game completed, before they start switching focus to things like modding, DM mode, porting to consoles or anything of that nature.
