They obviously know that the Marvel "timeline" event sold a lot of confidence that the movies would get made, and wanted lightning to strike twice, however, that's not quite always as true for Disney films.
(Ie., if it was a year ago, would have said "Yeah, 'Alice Through the Looking Glass', 'Pete's Dragon remake', sure, pal...
![Laughing :lol:](./images/smilies/icon_new_laugh.png)
", and it could arguably still be said about Pirates 5.)
It's very easy to announce a date for something you make up.