Concept: Earth Victoriana/Steampunk
Pictured: (left to right) Bat Man (Bruce Wayne), Accelerated Man, the Shrinking Man, the Wonder Woman (Diana).
Sources/Inspirations: Gotham by Gaslight (1989) and Batman: Master of the Future (1991) collected in Batman: Gotham by Gaslight, Wonder Woman: Amazonia (1997), Countdown Presents: The Search for Ray Palmer: Gotham by Gaslight #1 (January 2008).
Analogs: Pre-Crisis Earth-1889 was the home of Victorian Batman as established in Absolute Crisis on Infinite Earths (2006); post-52 Earth-19 features Batman plus several more Victorian analogs as shown in Countdown Presents: The Search for Ray Palmer: Gotham by Gaslight (January 2008) #1; Post-52 Earth-34 was the setting for Wonder Woman: Amazonia as revealed in Countdown to Adventure #1 (October 2007).
Comments: Gotham by Gaslight, with its story of an 1889 Batman facing off with Jack the Ripper, started the whole Elseworlds franchise (though its first printing predated the label). It's sequel has Batman fighting a Robur the Conqueror stand-in in 1892.
The Elseworlds Wonder Woman: Amazonia is set in an alternate 1928, which presents a different identity and history for Jack the Ripper (he becomes King after killing Victoria and her family). How these two distinct worlds are melded in Earth-19 has yet to be revealed.