Crossovers That Should Not Be XVII: Post 16 threads, and what'd'ya get?

[deadpan29]

Ebony wrote:

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The Melancholy of Tenchi Masaki
Personally, I'd get a bit melancholic over my series getting rebooted three or four times (I lost count), but that's just me.

Given that both Tenchi and Haruhi are implied to be manifestations of a supreme being, this isn't that much of a stretch.
And as the local Tenchi-Obsessive fanboy, let me run that continuity count by you.
1) The OAV timeline with Kajishima as primary creator.  Comprised of the OAVs, Tenchi Muyo GXP, and War on Geminar.  Suplemented with light novels and official mini-comics to expand events and background information.2) A series of light novels by Hasegawa, branching off from the end of the first OAV in a different direction.  The second Tenchi movie is based off of one of these novels.3) The manga by Okuda, running parallel to the OAV continuity.  Stuff in the OAV is consisdered canon for the manga, but stuff in the manga is not canon for the OAVs.4) Tenchi Universe.  The first TV series.  The first and third movie are based off of this and are generally considered to be part of that continuity.5) Tenchi in Tokyo.  The second and generally ignored TV series.6,7,8) Three different Magical Girl Sasami spinoffs: Pretty Sammy, Project S, Mahou Shojo Club.
Add to this radio dramas, video games, the one-shot Mihoshi special, at least one comic book that doesn't fit into any of the continuities above, etc.
Also, characters from the series above occasonally get cameos in other works by the same people or characters from other works get cameos in a series above.
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No, I don't believe the world has gone mad.  In order for it to go mad it would need to have been sane at some point.