1: "Fans speculate that a Grey's Anatomy theory hints at Izzie and Karev's return in Season 20."

2: "Will the beloved couple make a comeback after their sudden exit in previous seasons?"

3: "The theory suggests a surprising twist that could reunite Izzie and Karev with the Grey Sloan Memorial family."

4: "As fans eagerly wait for confirmation, the possibility of their return continues to spark excitement."

5: "Could Season 20 finally bring closure to Izzie and Karev's storyline in a dramatic fashion?"

6: "Stay tuned as the mystery unfolds and the anticipated reunion draws closer."

7: "With new twists and turns in every episode, Grey's Anatomy never fails to surprise its dedicated audience."

8: "Will the Grey's Anatomy theory predicting Izzie and Karev's return come true?"

9: "Find out in Season 20 if the fan-favorite couple will grace our screens once again."