I personally always assumed box theory was real, but that grinch leak was also real and those additional characters were either going to find their way onto the back of the box, be DLC, or otherwise come up as some kind of surprise in the single player campaign, or, maybe, that they would find their way to the game after launch with Sakurai letting us know he was still working on them ala Piranha. Again, Grinch leak is not dead yet until we understand the motivations of the leaker or until Fighter Pass is fully revealed. Wasn't Loz18 pushing Isaac as of a while ago? I don't see any law or verbiage from Sakurai that says someone can't be an assist trophy and a fighter. I am so thoroughly flummoxed by the circumstances behind Grinch leak that I require answers or I am assuming that it is rooted in some truth. It would easily be the strangest and most well thought out fake of all Smash history, which is possible but still not likely. I agree the evidence is weighing against Grinch leak, but I want answers before I stop assuming it's rooted in some part of the game's development.In an odd way. i thought box and grinch leaks where real it could've gone either way. I was leaning more towards Grinch though.
Either way, Honestly Box Theory being real wasn't a very big stretch.