So basically I have been playing COD for a couple of years and have never experienced this issue. The game lets me get into Multiplayer and get in a lobby. I am able to talk and hear people, but as soon as the game launches, the launch screen stays. Progress bars are still moving, but the map won't load. I tried re downloading everything for the game (including DLC) for the past month. Any ideas?
This issue might be freezing. What I can suggest is that you try to clear your Xbox 360's System Cache then try to play again online and check if the same issue will occur.
If yes, I would also suggest that you try your disc on another Xbox 360 or try other Ghosts disc on your console.