In Blitz mode, players will be attacking and defending zones on each end of a map. When an player makes it to the highlighted zone on the opposing teams side, they score a point and are instantly teleported back to their end of the map.
Thought I'd add to this instead of making a new thread. A new game mode has been revealed called Blitz :
The mode will be showcased at Gamescom so hopefully we will find out a bit more about it soon. Source : Call of Duty: Ghosts will have dedicated servers on Xbox One, Blitz mode revealed | Polygon