Even the media have joined in on the speculations. International Business Times theorizes the poster could mean "Meredith will be torn between herself and her beloved city in the upcoming season of Grey’s Anatomy." Now, at long last, Shonda Rhimes has spoken. Here's what the poster really means.
So, basically, these are the commenters who have the right idea.
Everyone else is clearly having way too much trouble waiting for the new season to premiere without having any knowledge of what happens to Meredith. It looks like they’ll just have to be patient till the fall.