If Lake of Sharks isn't really anything to do with Hergé, then it is like a fanwork
to do with Hergé - it was made with his permission, while he was alive, using a story by Greg (editor of the official Tintin
magazine, and with the art supervised by Bob de Moor (himself an animator) from Hergé's staff.
Admittedly Hergé was not directly
involved, but it certainly is different from a fan work, where the story, art and execution have no link to Hergé at all.
Add to that the fact that Hergé asked for no new Tintin books after his death, and that really puts the tin hat on it for new books.
Why can't there be other Tintin stories, just like Peter Jackson remade King Kong.
Your comparison to Kong
is a little odd, and I don't see how it applies to Tintin; Ernest B. Schoedesack and Merian C. Cooper (as far as I know) didn't stipulate that Kong
not be re-made (Edgar Wallace, nominal author, actually died with only a page or two of notes on Cooper's idea, before the film was made so his input was minimal, if any).
Are you suggesting that someone should re-make the Tintin albums?
Personally, while I don't think it is a great work, I find Sharks
to be not that
bad either - it's probably better than Blue Oranges