With the release of the new 'Kingdom Hearts III' trailer today, we finally got to hear a bit of Master Xehanort's English voice in the game. While there has been no announcement on who will be replacing the late Leonard Nimoy, we may have an answer. When someone tweeted to Mark Hamill (who voiced Master Eraqus in 'Birth by Sleep'), asking if he was the one who we heard in the new trailer, Hamill liked the the tweet back (which you can check out below):

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While this is by no means a confirmation, it'll be interesting if Mark Hamill truly does take over his 'Birth by Sleep' co-star as the voice of Master Xehanort.