They’re not super worried about Universal. And quite frankly there’s no reason for them to. Yes I am sure they will continue to build and expand to draw more people in, but Epic is still not targeted for young ones, as well as their rides are not typically super inclusive, if you’re too tall, too fat, etc, while Disney does not really share that same issue. Plus there are other factors at play.
I think Moana/Zootopia (in phases) will most likely start construction soon, with official artwork/announcement, as previously mentioned, at DestinationD next fall.
Beyond Big Thunder probably won’t break ground until 2025 at the earliest.