Something came up earlier that made me think up some weird game. Basically, take the tournament from SAO 2's Gun Gale Online, and then have a game with several of those over like a calendar year (think manager mode in FIFA games). It'd play like the actual tournament in the anime, with 1v1 qualifying rounds and then just one big battle in one massive landscape. I don't know really but I just thought "this would actually be a pretty cool game if it was real". Just take out the storyline from the anime and fix it all up and you're fine, I guess??? (Make it VR and you're golden)
I question how my mind works sometimes...