I’m unsure if this is widely accepted or actually forgotten or anything at all really, but during Scratch’s story takeover, he says that John is going to die. 

“And while I can’t give you my assurance, I’m reasonably convinced of this much. When the Hero of Breath dies for good, it won’t be as a scoundrel.”

==> Submitted by triumphantapostle

Source: I am portuguese.

==> Submitted by psychie-chan

http://www.mspaintadventures.com/?s=2&p=000197 

==> Submitted by m1ndb3nt

source

==> Submitted by mspt3k

http://www.mspaintadventures.com/?s=6&p=006290

==> Submitted by krankikat

There is a brief glimpse hinting at Kankri’s quirk in Mindfang’s journal. The fact that the journal briefly mentions the Sufferer at all, as well as it being the first reference to him, could be a forgotten fact in itself.

Source: http://www.mspaintadventures.com/?s=6&p=005658

==> Submitted by 777crimsonchaos

Source

Hope this qualifies

==> Submitted by absolutly-aquarius

Marquise needs to know someone’s blood color to completely take their will.

Source: (http://mspaintadventures.com//?s=6&p=005407)

==> Submitted by acediamond

==> Submitted by Anon

http://www.mspaintadventures.com/?s=6&p=004213

http://www.mspaintadventures.com/?s=6&p=003894

http://www.mspaintadventures.com/?s=6&p=003969

http://www.mspaintadventures.com/?s=6&p=003970

==> Submitted by sinmarai