Anguirus Was the First Monster Godzilla Ever Fought ... Destoroyah closed out the Heisei era, but the MonsterVerse shouldn't wait till it reaches its conclusion to feature him.

There have been four eras of Japan’s storied Godzilla saga. First was Shōwa, which was comprised of 15 films. Then there was the Heisei era, which started in 1984 and ran until 1995.