Hopefully he was referencing some shorter-term updates to the parks as all the D23 announcements are going to take much longer to come to fruition.
2025:
We already have Test Track 3.0 for Epcot, Villains show for DHS, Disney Starlight parade for MK, and Zootopia: Better Together show possibly for DAK.
I feel like Disney would feel that's enough for now to combat Epic's debut, to be honest.