You are using an out of date browser. It may not display this or other websites correctly. You should upgrade or use an alternative browser.
alternatehistory.com
Inspired by a comment here. (I've been here longer, & I've never seen this asked, either.)
So, what difference would it have made? I'm thinking an additional IJN CV sunk at Coral Sea (Zuikaku?), maybe Shokaku getting a bit worse luck limping home after (sunk by Sub Force; or maybe it's Shokaku sunk & Zuikaku sunk limping home), & no loss of Yorktown at Midway, for a start.