True to their word, BioWare announced this morning that they will release a DLC to expand/explain the Mass Effect 3 ending a bit more. It will be called the Extended Cut, it will release this summer, and IT'S FREE.
No specifics on the DLC were mentioned, but BioWare did say that the ending would be expanded upon (NOT CHANGED) with "cinematic sequences and epilogue scenes" that will provide "deeper insights into how their personal journey concludes."
"With the Mass Effect 3: Extended Cut we think we have struck a good balance in delivering the answers players are looking for while maintaining the team's artistic vision," BioWare cofounder Dr. Ray Muzyka said. Executive Producer Casey Hudson even said that all post-development DLC for Mass Effect 3 have been "reprioritized" just for the Extended Cut.
Players will have until April 12, 2014 to claim the Extended Cut DLC for free. That's what blows my mind the most; I really believed the DLC would cost something. I don't agree with BioWare altering their presentation of the ending at all, but I have to hand it to them for making it free.
Once it releases, I may start a betting pool on how long it takes for those who demanded a new ending in the first place to scream that this Extended Cut isn't what they wanted. You know that will happen; it's all a matter of when.
[Source]