I will say, while I don't think they would, I could see them actually announce New Tomorrowland for DL. Just because while Disneyland forward has been approved, it's going to take a while to do the infilstructure work (ie moving security, eastern gateway, etc) before they can build anything new for the theme parks. Plus they claim to be "turbocharging" investment and all we have heard about is an Avengers ride and a possible Avatar thing (that won't be built for 5+ years). So I could see them wanting something new to open at Disneyland that would be open and be able to advertise before the 2028 Olympic Games. Again this is just wishful thinking, knowing them they won't do it until 2040 and budget cut it down to just new paint.
My only hope for D23 is Tropical Americas, and that for the love of God they don't do Zootopia or Cars in BBTM and please announce they'll eventually do villains.