Type?
Varied. A LOT of different elemental dungeons(forest, fire, water, ice/snow, light, dark, desert), but also new unique dungeons(like Snowpeak Ruins in TP and Lanayru Mining Facility in SS).
Size?
Also varied. I want som dungeons to be HUGE(bigger than TP's dungeons) that can take like 5 hours, but also more average sized dungeons and also mini dungeons(though, those shouldn't count as normal dungeons).
Amount?
A LOT! 5 huge dungeons. 7 average sized dungeons. And 7 mini dungeons.