Disney is literally opening a ride on the day of their 50th, Harmonious will likely start next year or possibly even late 2021. They also have GotG, which will be opening during the 50th. And Tron possibly as well.But Universal doesn't really play up their anniversaries in their marketing, and except for a bit of merchandise, basically ignores them. . Disney makes it a centerpiece of their marketing/ad campaigns.
It's not perfect and sure, i'd love a new night parade or fireworks (although I enjoy HEA just fine so a 50th anniversary tag is fine with me). I know this stuff wasn't originally meant for the 50th, but let's not act like Disney isn't going to be able to have a fairly impressive amount of things to promote as new during the 50th celebration.