The bags, armor and quest part must be a hint towards the expansion. Quests will return more than likely, the bag thing might be a new unique flavour card like spellstones or ranked spells. The bags sounds like some form of value type of card that when played/unpacked, adds stuff to your hand or deck.
As for the armor? Could be simple like more armor decks but I do wonder if it could be a new mechanic... a type of weapon that doesn't attack and comes with some passive ability. Some durabilty/health that your opponent will have to get to 0 to remove it from play similar to the shield of bulwark or whatever for warrior.
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