CONCEPT: Imagine that the fandoms sometimes have these get-togethers where they allow others to experience all of their worst blunders. You know, the entries in a series that even most of the fans can't defend.
For example, Doctor Who would probably show Love and Monsters. OR maybe some of the really bad episodes from the 80's.
Star Wars always has the holiday special to fall back on...
Any older cartoon fandom that's ever had one of those shitty live action movies made can show that.
The Beatles can show off Revolution 9, and all the other fandoms in the room will just sit there uncomfortably, staring wide-eyed at the music player as this is not at all what any of them expected, until finally someone is just like "...What the fuck was that."
AND THE BEST PART -- and this isn't even a fandom we've ever had here but like stay with me -- so you have Sonic at one of these little gatherings, and a lot of the other fandoms there, especially the other video game fandoms, already know what game he brought, as many of them are at least vaguely familiar with it. And when it's finally Sonic's turn to boot the game up, a lot of the other fandoms are like "I mean... it can't be that bad... not after everything else we've seen tonight." But Sonic just sits back with this smug look on his face like "Nah, go ahead and play it -- play it if you don't think it's so bad". And then he can barely control his laughter as he watches everyone react to how bafflingly and frustratingly bad it is as they struggle to play the game.
I could go on about that last bit for quite a while, but I think you get the idea. XD