Oh what could have been! It is only DOTF concept art, and nearly all of the concept art for Star Wars looks amazing, but these videos really highlight the art and possible DOTF story and potential:
Would Duel of the Fates have been better than The Rise of Skywalker? | Script & Concept Art Leak by Hello Greedo
Colin Trevorrow’s Duel of the Fates Concept Art | Full Breakdown by ATAT Chat
STAR WARS: DUEL OF THE FATES - More Awesome Leaked Concept Art to Pine Over by Star Wars Time. ‘Part 2’ of the concept art leaks?
The fan made DOTF comic by Andrew Winegarner also looks awesome: