Something unreported however until now, was when asked about creating new characters, Chris Claremont said,
"I have to say quite honestly as I understand it now the X department is forbidden to create new characters.
(SHOCK RESPONSE)
"Well… who owns them?
"All because all new characters become the film property of Fox.
"There will be no X-Men merchandising for the foreseeable future because, why promote Fox material?"
Forty-two minutes in… but you should listen to the whole thing. Chris Claremont currently writes the X-Men comic book Nightcrawler, with a new issue out tomorrow.
We have reported this character-creating issue before now, but this is the first time I've heard an X-book creator confirm it publicly. We've also been told though that if you can create new characters under the guise of a Marvel Now style event, then they can be attributed to Marvel Now and not to an Xbook… so Marvel gets to keep the film rights.
Source
Makes sense. Depending on the agreement with Fox and their rights as far as adapting existing stories for film, why would Marvel want to write their movies for them?
I wonder if this was the original story from when rumors were swirling about all of the X-books being cancelled and someone confused it.