It’s 100% far-fetched. It’s fan-fiction from a very controversial subreddit. The idea that Iger, who sought out Abrams personally, only did so to hamstring WB’s attempts to make successful DC movies (which they’re already doing - Joker is going to make more than Rise of Skywalker worldwide) doesn’t make any sense unless you’re the sort of person who is already inclined to believe all the conspiracy theory stuff that goes along with being a DC “Release the Snyder Cut” fan.
A hashtag on twitter isn’t evidence of anything but people on twitter enjoying the open trade of hot takes and loud opinions. Besides which, there’ve been warnings that malcontents would be pushing a “Release the JJ Cut” campaign last week, because being loudly anti-Disney is good money for a lot of people whose online incomes depend on patreon donations, YouTube monetization, etc.