I only know mininal on Eternal Champions, seems an odd choice when any other Sega fighting game would do.
Story-wise, Eternal Champions is the one with most elaborated story among all SEGA's fighting games.
If you've ever beaten the game, you'll know that because the ending will throw a wall of text about what's happened to the character after they won.
Their in-game character biographies also written a lot in the game :
https://www.youtube.com/watch?v=VQ1LfgIPvO0Plus it also has two 200+ pages gamebooks.