I'd be willing to guess HTTYD, Fantastic Beasts, Two original UC lands and Pokemon.
IOA opened with Marvel, Seuss, Toon Lagoon, Jurassic Park, Port of Entry and Lost Continent. Which, in theory; was about 6.
If they have Two expansion pads; that can allow eight areas for future use of the park, and that would actually be great for Universal to do.
Six Hyperrealistic lands; Based on popular IP's that have ride potential and an original thing for Universal Creative to toy around with, making something unique.