User blog comment:Subject 12/Assassinews 04/07 -- Assassin's Creed III at PAX East/@comment-1471082-20120409112744/@comment-207.161.161.245-20120410234240

Ubi hasn't given out much information about multiplayer for AcIII, but it is confirmed that we will get multiplayer characters from the different edditions of AcIII, so there will definentely be a multiplayer.