For anyone that might have had a similar issue, I deleted all update and DLC data from Mario Kart 8 and then my system magically started reading the disc again.
I'm currently reinstalling the updates and DLC in hopes that this works.
And it isn't. Oddly enough, it actually recognized the game, but after reinstalling everything, it stopped working again. And unfortunately, it won't let me try it without the update. I manage to get it to recognize Mario Kart 8 after trying a ton of times, but it just won't load the game.
Message was edited by: LEAFB2