Truly, truly, I say to you, an hour is coming, and is now here, when the dead will hear the voice of the Son of God, and those who hear will live.
John 5:25

Although it's true that those who have died physically will one day be called out of the grave, that's not what Yeshua was talking about here. These are the spiritually dead who will hear the Gospel, believe, and repent. Then they will be reborn spiritually.