ReverendTed post some more info about the incoming patch on Planet Soldier :

"Activision dropped us a line to let us know that "So far, word has it that the patch should be ready by about the middle of next week if all goes well," and to drop off 9 lovely screenshots showing off the new Demolition gamemode, the new MP5 weapon, and a few areas of the new maps. (There will be four new maps in all.)"

You can check the screenies of the new gametipe at Planet Soldier.