Zombies Argument

For starters, the logic that the name that appears at the top of the screen is the name of the map is flawed. Green Run only makes sense because it is referenced as if it were a map in Achievements, while TranZit is referenced as if it were a gamemode. With Die Rise/GLF it loses it sense, as all achievements refer to Die Rise as the map and not as a gamemode. Mob of the Dead, for obvious reason I can't say but it is likely to keep the trend. Furthermore, as mentioned many times, this would mean Nuketown Zombies is actually named "Nevada U.S.A." also, where Tranzit was advertised by Treyarch as a gamemode, they have repeatedly reffered to Die Rise and Mob of the Dead as Maps.

Tranzit was referred to by Lamia as a "Campaign" mode prior to the release of BOII. At the time we all assumed this meant a traditional campaign, and we would move from place to place completing objectives. This is not the case in the actual product. What Lamia meant by "Campaign" mode was tha TranZit is an over-arching gamemode that takes place across Green Run/Die Rise/MotD/DLC3/ and DLC4. This is why things like persistent perks and navcards carry over from Map to Map

Great Leap Forward could simply refer to a mission or story element. but based on Nevada U.S.A and Alcatraz Island, could simply be a creative location name