Mass Effect 3: Citadel DLC Announced

In case you're looking forward to play more Mass Effect 3, BioWare has announced a new single-player DLC, titled Citadel, which is also apparently the final add-on for the title. Here's the description:
All good things must come to an end, and that includes the Commander Shepard trilogy. However, just because it is coming to an end, that doesn't mean we can't go out with a bang. Introducing the final Mass Effect 3 single-player DLC: Citadel!

When a sinister conspiracy targets Commander Shepard, you and your team must uncover the truth, through battles and intrigue that range from the glamour of the Citadel's Wards to the top-secret Council Archives. Uncover the truth and fight alongside your squad as well as the cast from the original Mass Effect and Mass Effect 2.

When the adventure is over, reconnect with your favorite characters from the Mass Effect Trilogy, try your luck at the Citadel's Silver Coast Casino, blow off steam in the Armax Combat Arena, or explore and furnish Shepard's own living quarters on the Citadel. With unique content and cinematics featuring your friends and romance interests in the Mass Effect trilogy, Mass Effect 3: Citadel offers one final chance to see the characters you have known for years and rekindle romances.

Apparently the DLC is massive too, at least in file size:
One important note.

For Xbox 360 users, the Citadel DLC pack will come as 2 downloads on Xbox Live. ME3 Citadel is larger than our previous DLC packs, so it had to be split into 2 downloads. The first pack is priced at $14.99 and the second pack is tagged as free. Players need to purchase and download pack 1, then download pack 2 at no additional cost.

You can download pack 2 without purchasing pack one, but the DLC will not work. You will get an error message in game asking you to download pack 1. It will say "This DLC will only work in conjunction with Part 1 of Mass Effectâ„¢ 3: Citadel, which is split across 2 downloadable packages. Please purchase Part 1 prior to downloading Part 2 at no additional cost.]"This will not hurt your saved game but you will not be able to launch Citadel until you have both packs.

This only effects [sic] Xbox 360 users. Citadel for the PC and PS3 is in one pack.

And in case you needed any more confirmation, community manager Jessica Merizan confirmed that the DLC isn't post-ending:
Citadel is NOT post-end DLC. The scars in this screenshot are from Lazarus Project. Hope that clears things up!