Wow! That is a whole lot of goodness. You can learn more about the design and look of each of these treatments in the Modern Horizons 2 Booster Fun article.
Every Modern Horizons 2 Collector Booster will include four rare or mythic rare cards. Included in the Collector Booster will be three foil-etched cards (one of which is always a foil-etched basic land), nine traditional foils, a foil double-sided token, and three non-foil cards. There are 153 unique foil-etched cards that can be found inside the Collector Booster. This includes ten basic lands, select cards from the original Modern Horizons, and retro frame and new-to-Modern cards from Modern Horizons 2 (including enemy fetch lands).