Read this, it's extremely important

Every FPS gets a DLC that is multiplayer based. That's great.
But with the supposed reports that Nomad is still alive (freaking somehow, I think he's Lockhart's nephew or something. more on that later) we need a DLC that is Nomad catching up to the city after the events in C3's main story. He catches up with Psycho, who has recovered his nanosuit because he "missed out on the fun stuff."
They set out to take down the last of CELL's stragglers who are attempting to rebuild.
Watch the ending of C3 after the credits roll, you'll understand this part.
Along the way, the two find people still in the work-away-debt scheme and get up to date with what has happened in each others' lives.

If you already aren't thinking this in your head, this is a co-op DLC. Yeah the MP can get new maps, guns, and glitches, but for once expand the campaign.

Ah, you you mean back in the days when they were known as "expansion packs"?

"We do have a big plan to support it" Well, get those patches out and fix the big issues the game has then!

If they're going to release map packs as a DLC again, I'm not buying them. I bought both map-packs for Crysis 2, and never played a single public game on them due to absolutely no-one playing them. I only played a few private matches on each one.

A campaign DLC would be pretty nice though. Would definitely buy that.