This is something I was thinking about recently what if the Royal Flush Gang that was lead by Donna Walker's father didn't show up until the mid to late 2010s since 10/Donna would have been in her late teens at that time and her future husband mr. Walker would have been under the Jack mantle.
The Royal Flush Gang may been the last super villains to face the original Batman in the Beyond bat-suit. it is very likely that King / mr. Walker and Queen/Donna Walker recognized the bat suit worn by the new Batman since it was worn by the original put broken the gang up in the first place.