Remember Batros? The villainous criminal that wasn't a part of Skeletor's gang but Skeletor somewhat respected.
Had an evil plan where he steal valuable books containing critical information from Cast, and extort them for power?
Wore a possible prototype of the Horde Symbol from when the Horde was still in development?
Who set up his lair in the abandoned Temple of the Sun, which is hilarious for obvious reasons?
Most people proposing redesigns just fold him into the Speleans
The Speleans (represented here by Lord Dactus)
Just as we have multiple cat and reptile people spread across Eternia and Etheria, I think we can allow for additional bat people if they fill another niche
While the Club Filmation figure toy bio implies his whole race is evil... that's really, really against the spirit of the show, but there is aesthetic also helps give an idea for nonevil and civilian types
19th and early 20th- style Vampire and bat-costumes and illustrations
Batros has the makings to be a "gentleman thief" that talks badly about everyone behind their back. (but you know, still ripped because this is Eternia.)
There is also the idea his personal logo could be based on the Horde. Perhaps he is a descendent of a Hordesman stranded on or recruited from Eternia? Found some artifacts from a failed invasion of Eternia and was inspired?