The approach to adding extra content post-launch to the game has changed, with a focus on adding characters and gameplay content (
perhaps additional modes) on a regular basis, rather than publishing a new edition of the game every year or two.
Not exact matches
Perhaps if they also added some
additional content or single player
modes, it could hold a bit more value, but I don't think it could save the game.
The combo system and
additional Horde
mode add a little something along side the thin story campaign, but there's only a certain amount of replay value to be found once you've really had a good blast through with friends;
perhaps even less if you've opted to play it alone.