Most Elseworlds can be described as "A familiar character (usually either Batman or Superman) IN SOME OTHER TIME PERIOD! This dates back to the proto-Elseworld, Gotham by Gaslight, set in the 1890s; other examples include Kal (Middle Ages), The Batman of Arkham (1900), and Shogun of Steel (Feudal era Japan).
There's a comic book adaptation of Moby-Dick in space. The whalers are asteroid miners, the giant squid is a white star named Kraken, Moby Dick is a (possibly sentient?) comet, and the final harpoon is a 10-megaton warhead.
ODY-C is The OdysseyIN SPACE, telling the story of warleader and starship captain Odyssia's return home to the planet Ithacaa following the sack of Troiia.
Ramayan 3392 AD is the Ramayama IN THE POSTAPOCALYPTIC FUTURE!
Marvel's Space: Punisher miniseries is almost Exactly What It Says on the Tin — The PunisherIN SPACE! (The inexplicable colon in the title seems to suggest Marvel is slightly embarrassed to look like they're embracing this trope that blatantly.)
Marvel'sWhat If? v1 #14 featured a story called "What If Sgt Fury Fought WWII in Outer Space?", although this was a reimagining of the same events depicted in mainstream Marvel rather than a spinoff or sequel.
DC's The Witching Hour #14 had a story titled "The Haunted House In Space," literally about a haunted house floating through space on a chunk of rock.