Then more than two years passed.
In February 2021 Matsuuchi announced that IDW Games would not be releasing the design:
If you are one of those patient fans, your patience is now being rewarded …sort of, as you still have to wait at least one more year.
CMON has announced that it plans to release Metal Gear Solid: The Board Game in May 2024, with a pre-order open now for the “Integral Edition” of the game that includes a graphic novel that illustrates each mission, as well as a 13 cm tall “Metal Gear REX” miniature.
CMON notes that the game’s 14-mission campaign will be the same in both the retail edition of the game and the “Integral Edition”. Additionally, it clarifies that “all exclusive promos are exclusive to this Pre-Order (or crowdfunding platforms), with remaining stock available through conventions and special promotions only”, so maybe “exclusive” isn’t quite the right word.
For more on the game, you can check out this interview with Matsuuchi (and IDW’s Spencer Reeve) at Gen Con 2019: