Actually, Minecraft 26 comes out this year. They dropped the "1." and bumped the sub-version from 21 to 26 to match the year. They've also changed the way the new second tier works to be related to the quarter-year.

26.1 is due next month.

So yeah, there'll never be a Minecraft 2.0. The versioning no longer allows for it.

(This doesn't rule out a game called "Minecraft II" with its own set of unrelated but identical version numbers. Minecraft II 36.1 drops in ten years. Maybe. But probably not.)