Will my EA Play subscription transfer over to a Game Pass subscription or will it be canceled?

As long as you have 50 days or more left of your EA Play sub it will converted to a gamepass sub although i'm not 100% sure what that conversion rate is as i've read different things.

If his subscription is Xbox Live Gold, then cancelling the subscription will not affect Fortnite, as he will still be able to play that game online.

If however he has Game Pass or EA Play, then cancelling the subscription will stop him being able to play the games that are included in the subscription.

Hey Mario

Thank you for taking the time to post this on the Xbox Forums. We understand that you are inurning about the status of your EA Play subscription moving forward.

There is an article that covers all this info titled
EA Play with Xbox Game Pass FAQ that I would encouarge you to read for further info on this,

If you’ve purchased both Xbox Game Pass Ultimate and EA Play through the Microsoft Store when the EA Play member benefit unlocks for Xbox Game Pass Ultimate members, your EA Play subscription will be canceled, and any remaining time over 50 days will
be rounded up and converted to the nearest month of Xbox Game Pass Ultimate at a ratio of three to one.

I hope this helps clear up any confusion this might have caused.

Hello, first it's a pleasure to be able to help you today.

My name is welcome to the community.

Hello Tadis, you don't need to cancel your EA PLay, the Game Pass Ultimate subscription already has EA play, if you already have EA in your Microsoft account, you can purchase the Game Pass Ultimate subscription from the same account, which will keep your progress and data you already have from EA.

You say that you cancelled your subscription to Ultimate a few days ago, did you subscribe to Game Pass Core (sorta used to be Gold) after cancelling Ultimate? When you cancel Ultimate, it cancels all of it. Game Pass, EA Play, Online Multiplayer,...all of it. Once cancelled, you have no subscription at all and need to resubscribe to whichever level you want.