Yes, it is true and firstly, I want express "Thanks" to CnCBacano from Official EA Board for this cool information.
I don`t know why, but a little information was leaked from Spanish website which posted an article based on information from Mike Verdu, Executive producer of Command and Conquer 3.
* Third faction is Aliens ( read as Scrins )
* GDI and Nod have 35 missions, Aliens - 15
* Nod will looks like a group of the human who whants only one thing - life. And GDI as military group with monopoly in liveable territory. Shortly, Nod is good, GDI is bad.
* Multiplayer for 8 players
Das habe ich gerade auf GameReplays.org gefunden... also doch Aliens..... (http://www.gamereplays.org/cnc3/)