As we all know, there are some trading card mods out there that were really cool. But sadly, most people who were working on those mods aren't really updating them anymore. We need a official trading card mod that will always be updated with new content every half a year or so. Unlike other trading card mod out there, this trading card mob will be inspired mostly by Hearthstone (an easy and addictive game by blizzard). It would work out like this:
Players start off with 10 packs of cards. Each card packs will always have at least one rare but can also contain an epic or legendary.
The last trading card mod mostly had mobs and blocks. It was good but i think it's best to scale down to just the mobs. As for Spells, Weapons, and such, they will be base off of things like Drinking Potions, Shield Blocking, Enchanting, Spawning, and pretty much that people normally do in minecraft.
The First set will includes the basic set of Vanilla Minecraft, Minecraft Storymode, SkinPacks, and maybe some others in there too.
The Expansion Packs will include mobs and items from other mods such as: Betweenlands, Twilight Forest, Aether, Special Mobs Mod, Anti Plant Virus Mod, Erebus Mod, The Ender Expansion, Primitive Mobs, etc.
Best of all, it's easy to code all this in. Just need to make the items and such with a right click ability to view the cards in more detail.
And if this doesn't interest you then i don't know what will.