This is a good game, it's just not looked at as a good game.
A fun epilogue, that does not have to do anything with the single player campaign, is a Nazi Zombie mode. The objective of this mini-game is to survive as long as possible in a deserted building. Killing or making contact with any bullet or knife, can grab you points to purchase ammo and new weapons, as well as barricades to hold the zombies out of the house. Grenades work pretty well against them too, but they blow in half and still trail after you while cut in half. This mode can be unlocked when you complete the game, and can be done with other friends of yours.
The multiplayer seems to be much more balanced than the beta did. The similarities between CoD 4 and CoD5 multiplayer are almost identical, with a three kill streak unlocking radar, five kill streak unlocking artillery, which is identical to air strike form CoD4, and a seven kill streak nabbing you attack dogs. The point system and everyhting else seem to be similar.