Well, it all depends on what you mean by "plays a lot more like guild wars". But I don't think NWN3 will be a MMORPG. I haven't read anything about Atari/Ubisoft preparing a new D&D MMORPG in the near future.
Doubtful, alas...
The only thing sure is that it will be Atari/infogrames doing it, and there will be a neverwinternights 3. Will it be the first, that is the question...
The best IMO :
PHB : 96 pages (spells included)
DMG : 96 pages (magic items included)
MM : as much as they want (at least 200 different monsters) :)
I don't need hundreds of pages of rules.