My thought still stands. They will completely remove the 4j version of Minecraft and replace it with theW10 version. Likely in the time leading to the change you will see content on both line up. Then the W10 version will release, masquerading as a huge Title Update for X1 only.
Look at Terraria. They are doing EXACTLY this right now. Just look at the articles; the version the author is demonstrating has the exact, identical title as our game.
Would MS have two competing versions of Minecraft on Xbox One, with Identical titles? Of course not.