If you guys enjoyed the last episode of Grey's Anatomy, which was extremely flashback-heavy, then I've got some good news for you!
Grey's show-runner, Shonda Rhimes, says that we should strap in: there are more flashbacks ahead for us! She's definitely looking to focus on "the years when Mark Sloan, Addison, Derek, Sam and Naomi were all at medical school together... or when Meredith's mother and Richard were together."
As for the present, Rhimes says that we'll see more of Richard as Dr. Webber and what it's like for a doctor post-rehab.
Rhimes would also like to put Addison and Mark back together but no official word yet.
Source: TV Guide Magazine