This is a "What If" creation of Mezco Toys based on Batman, Gotham by Gaslight.
The story imagines a Steampunk style Batman chasing Jack the Ripper. The Joker was not part of the original story, but Mezco imagined the Joker as a cringeworthy Jack the Ripper, complete with leather butcher's apron. As part of the set with Batman it makes a great limited run set.
Figure is very impressive in hand, video reviews don't do it justice. Detail, sculpt and paint work is top notch. The soft goods are stellar quality and the tailoring is perfect. Loads of accessories and display options make this a very fun and versatile figure.