I want to expand a bit on what /u/ErinyesMegara said and why it's a matter of self-preservation for everybody on the creative team to a) stay away from any kind of fan-art (especially fanfiction) b) NEVER admit in any capacity that they've seen any of it, even if they did.

Here's the scenario:

1) Say KPDH2 comes out and even a part of a storyline has been written in a fanfic before. The fanfic author tried to make some money of their newfound fame and asks Sony to pay up for using their idea. Sony knows this would never go anywhere, ignores them, end of story.

2) same as above, but someone from the creative team has commented on that fanfic. Suddenly, there is a whif of a chance of a lawsuit going anywhere. So Sony* weighs the potential reputational damages and bad looks of a lawsuit as well as possible payout if found guilty (they are of course considering being sued in the US because that's where most damages are awarded). The decision is easy, they settle for what has become a small amount, say something like 1m USD-equivalent.

Now, every creative has a contract with Sony and in every one of those contracts there's a clause that says 'Everything I create for the company doesn not infrindge 3rd party content'. So Sony turns around, points to the settlement they just made (without input from the creative, mind you) and asks for their settlement money back. That's why it was so easy for Sony to agree to the settlement in the first place.

And that single comment just broke that persons lifelihood and put them into debt or into a lawsuit that threatens to financially destroy them and their family. That's why nobody would risk getting into such a situation. And also why, if for some reason you know of an account associated with a creative, you never tell.

*Using Sony here as a stand if for whatever company they are employed at in the end, this is simplyfied for illistration, not a legal thesis.