Since Black Ops 2 has dropped the CoD Points from the game, the gambling-based Wager Matches have also been removed. But fear not, as David Vonderhaar has confirmed that they still have equivalent "oddball" game modes in "Party Games":
David Vonderhaar: "In Black Ops they were called Wager Matches, and there was the 'gambling' component. But those somewhat oddball, out-of-context, just kind of fun game modes are actually going to make a fairly significant return in Black Ops 2, as what we call Party Games. We think about them as you and I just goofing off, having some fun in this arguably slightly silly game mode. We love making those game modes, and they'll be a part of this game too. They just don't have the mechanic of gambling in them in that way, because there are no CoD points."
Treyarch will apparently reveal more about the new Party Games in the coming months. Vonderhaar also revealed on Twitter that the new Prestige System will be detailed during September.