A post from HateToFly on Orlando United forums-
"Characters and properties to keep an eye on IMO...
Mario and Luigi
Princess Toadstool
Bowser
Donkey Kong
Diddy Kong
Metroid
Link and Princess Zelda
Pokemon"
http://www.orlandounited.com/forums...iversal-Parks-amp-Resorts?p=404414#post404414
So if true, that means that we could get presence from the Mario, Donkey Kong, Metroid, Zelda and Pokemon series'. Though which IP's get major rides and attractions, and which ones get less substantial presence (like merchandise and character greets) is another question. Still cool info though.
I know the plans involve most of the properties that @HTF lists above. A few I haven't heard, but that doesn't mean they aren't included as well.