Star Trek is listed as one of over 400 series in the Tommy Westphaill Universe or John Munch U
niverse.
https://thetommywestphall.wordpress.com/
But another site has a much smaller list of
Star Trek crossovers:
https://fictionalcrossover.fandom.com/wiki/Star_Trek
A third site has different stardards for counting crossovers:
http://poobala.com/crossoverlist.html
It's version of the Tommy westphail universe is known as "Group 2" and had only one hundred plus a few more series the last time that I counted. It puts various
Star Trek series in "Group 10" which has 17 series in the list I saw today. It doesn't list any
Star Trek series after
Star Trek: Enterpise.
I note that's its "Group 30" includes 18 shows which are included in the Tommy Westphail Unverse, along with
Star Trek, according to other sources. One of the Shows in "Group 30" is
Girl Meets World, which is also one of the shows in the Disney Channel Live Action Universe:
https://tvtropes.org/pmwiki/pmwiki.php/Franchise/DisneyChannelLiveActionUniverse
And
Girl Meets World is also a series in the TGIF Universe.
https://tvtropes.org/pmwiki/pmwiki.php/Franchise/TGIF
I note that there might be a crossover between TNG and
Webster,
https://memory-beta.fandom.com/wiki/Webster#:~:text=Webster was a 1980s TV sitcom whose final,must unexpectedly adopt a young boy named Webster.
Howevr, I don't know of any alleged crossovers between any other shows and
Webster, so even if that corssover is correct it wouldn't lead to much.,
And don't forget this thread:
https://www.trekbbs.com/threads/star-trek-is-part-of-mcu.293148/
And:
https://www.trekbbs.com/threads/ridiculous-crossovers-youd-like-to-see.268483/page-21#post-12913966
And:
https://www.trekbbs.com/threads/if-you-could-crossover-st-tos.302861/page-2
I have seen a website that put
Star Trek in the Wold Newton Universe.
http://www.pjfarmer.com/woldnewton/Spock.htm#:~:text=THE WOLD NEWTON UNIVERSE AND STAR TREK by,direct descendant of the Great Detective, Sherlock Holmes.
I note that there are other examples of writers combining several different fictional fictional universes in a larger one.
Are there any crossovers between
Star Trek and the Cthulhu Mythos?
https://www.trekbbs.com/threads/cthulhu-in-star-trek.78831/
A number of science fiction writers put several of their ficitonal universes together as parts of one fictional multiverse. They include Robert A. Heinlein and Isaac Asimov.
James Blish may have done something similar, since some separate stories from separate fictional universes have elements in common, suggesting that the separate fictional universes are alternate universes in a larger multiverse. And James Blish inserted elements from
Cities in Flight and from 'This Earth of Hours" into his adaptations of TOS episodes. This suggests that maybe, perhaps
Star Trek could be considered to be an alternate universe in a multiverse containing at least some of Blish's fiction.
So which shows someone thinks
Star Trek is already in the same fictional universe as depends on their standards for classifying TV series, movies, books, comic books ,etc. in the same series.
