Kiparis: This beast of an SMG from Black Ops sadly didn't make the cut.Stoner 63 LMG: The Stoner 63 has a text string in the files.Grim Reaper: The Grim Reaper from Call of Duty: Black Ops has an unused Create-a-Class icon.Probably replaced by the RPD, in a complete reversal from the first Black Ops (where the RPD was replaced with the RPK) in either case the wrong weapon was used. RPK: A text string for buying the RPK can be found.A text string for buying it still remains. Skorpion: Not to be confused with the new Skorpion EVO but rather the Skorpion from the first game.Sabertooth: A chainsaw that was cut from the first game but has a text string for buying it in Zombies.Thunder Gun: While replaced by the Jet Gun this time around, a text string has been found for buying it off the wall.OLD P90: A string can be found in text files.However, the pick-up icon still remains in the game's data and has a string mentioned in the text files. Commando: The Commando from Call of Duty: Black Ops didn't return and can only be seen in the Behind the Scenes video.
Interestingly, the War Machine is called the "XM25" in the game files (but only for Zombies mode). XM25: The XM25 from Call of Duty: Modern Warfare 3 has an unused Create-a-Class icon and a text string to buy it in Zombies, and judging by the different design compared to the used Create-a-Class icons, it was cut early on.
However, most of those weapons were still mentioned in the text files for Zombies (most likely leftovers from Black Ops). Sadly, most weapons from previous titles did not return in Black Ops II in order to fit the futuristic setting.