TmarTn, avid poster on the Call of Duty: Black Ops 2 forum, has taken the time to analyze the Black Ops 2 multiplayer reveal trailer to identify all of the Killstreaks coming to Treyarch's newest installment in the Black Ops series.
TmarTn created a full graph of the Killstreaks as seen below:
He also put together a great video of his findings, and how he found them, on his Youtube channel. From the looks of it, he's on the right track. In fact, I doubt that much of his judgment will be wrong. He certainly put a lot of time and effort into his findings, so check TmarTn out at his Youtube channel and watch the video he made walking through his breakdown of the Killstream graph.