In 2011, the website cartoonpaperwork.com posted the storyboards for an alternate version of the GI Joe season 2 intro sequence, drawn by Mike Vosburg. The produced sequence that appeared on all season 2 episodes being storyboarded by Keith Tucker.
There was no reason to believe that it wasn't a simple case of one version being approved for production and the other not...until now. A local TV promo from 1986, promoting a movie edit of the season-launching miniseries Arise, Serpentor, Arise, uses footage from the supposedly unproduced version of the intro.
To view the storyboards and compare, head to: G.I Joe misc. storyboards viewing gallery