1: "A Greys Anatomy theory suggests Izzie and Karev could come back in Season 20."

2: "Fans speculate a possible storyline for their return on Greys Anatomy."

3: "Could a shocking twist bring back Izzie and Karev in Season 20 of Greys Anatomy?"

4: "Greys Anatomy fans theorize about the only way for Izzie and Karev to return."

5: "Will Greys Anatomy writers consider bringing back Izzie and Karev in Season 20?"

6: "Fans of Greys Anatomy share their theories on Izzie and Karev's possible return."

7: "What could be in store for Izzie and Karev in Season 20 of Greys Anatomy?"

8: "Greys Anatomy Theory predicts an epic comeback for Izzie and Karev in Season 20."

9: "Stay tuned to see if Izzie and Karev will make a dramatic return in Greys Anatomy Season 20."

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