If I am doing the math right it was also 14 years between the initial announcement of Duke Nukem Forever and it’s release. Guess HL3 is about to become the longest-running vaporware game.
It is only nine years between the release of the second book in The Kingkiller Chronicles and now, despite its author’s claim around the time the first was published that all three were ready to go in quick succession. But it is 27 years since volume 4 of David Gerrold’s War Against The Chtorr.