this is great news, also vehicles confirmed but not sure if they are for MP too.
i guess yes as we have confirmation of the pinger already.

http://www.gamesas.com/news/dev_diaries/inside-crytek-filipe-amin--q-a

in another interview they said they added the pinger to Crash Site because people asked for vehicles. What we want is bigger environment where you can actually drive vehicles :/

yeah the vehicles in crysis 2 were pointless, definitely need bigger maps for driving.