Bleach Chapter 679 Spoilers
Personally I don't think it's genuine, while it does seem plausible it's very early for real spoilers.
There's some text with the spoilers, I've translated best I can:
Isshin saves Ichigo. Ichigo and Icchin realise they can't defeat Yhwach with power. Icchin says that as he has his mother's eyes, he needs to use the power of seduction. The guy doesn't say whether it works or not, but apparently Ichigo transforms again. And then the guy just talks about the rumours of Bleach's background artist getting his own spin-off based around Ichigo's left testicle.
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All characters and events based within these works, even those based upon real people, are entirely fictional.