Marv Wolfman, scribe for the Crisis on Infinite Earths, has repeatedly stated (first hinted at in his introduction to the original Crisis collected edition hardcover), then fully explained on his website that he left a loophole in the script wherein the Barry Allen Flash could be reintroduced, without a retcon, into DC Universe continuity.
Marv Wolfman, penulis untuk Crisis on Infinite Earths, telah berulang kali menyatakan (pertama kali mengisyaratkan dalam pengantar hardcover edisi terkumpul Crisis asli), kemudian sepenuhnya menjelaskan di situs webnya bahwa ia meninggalkan celah dalam skrip di mana Flash Barry Allen dapat diperkenalkan kembali, tanpa retcon, ke dalam kontinuitas DC Universe.