Yes obviously WB is panicking that one of the three legs they have built they're next decade on is proving to be so unstable, and DC is only now starting to find it footing, so lets hope for their sake that those LEGO movies keep doing well. But on Universal's side I'm picturing the Fantastic Worlds commercials/billboards... Mario, A Trained Dragon, Dracula, and Newt Scamander, it just seems off.
And I really wish Ministry of Magic was replacing Fear Factor instead, I'm sure what ever Universal comes up with will be neat, but it will be tough to be as pumped to go on a Ministry ride that doesn't feature Dolores Umbridge, Lucius Malfoy, or Arthur Weasely. You could make, say, a Fantastic Beasts-era Gringotts Ride but people wouldn't like it as much as the one we have now because it wouldn't have the characters we love.
Again I'm not doubting Universal's ability to make great attractions and beautiful lands and I am really interested to see what they do with a new park, but in this particular case it's difficult to be excited ahead of time when they are about not just a property you don't like, but a twisted and ruined version of a property you adore.