The cast and writers of Grey’s Anatomy have spent the last few weeks dropping hints about the Season 9 finale, and they’ve made it totally clear that we should expect something completely unexpected. It’s official: we’ve been warned. But now, it looks like it might span the last and second to last episodes of the season, too!

Yesterday morning, Jessica Capshaw (Arizona Robbins) tweeted, “Woke up thinking about what's coming in the final 2 episodes of GA...I don't know how @shondarhimes does it. This is going to be thrilling.”

We already know the script for Episode 23 is being kept confidential, and, thanks to creator Shonda Rhimes’ tweets, that whatever happens at the end of the season will be bold, shocking, and keep us talking all summer. But what could it be?

Whatever it is, we have a feeling it’ll blow our minds! What do you think will happen in the season finale?

Catch the next new episode of Grey’s Anatomy on Thursday, April 4, 2013, at 9 p.m. ET/PT on ABC.