Oh yeah. So 20 Actions, 3 Treasures and 3 Victory. 3 Of which are also Reactions, but I don't think we can assume that they will all be Action-Reaction type cards.
It seems like the wording is intentionally ambiguous, which suggests to me that we will see some new dual-type like Treasure-Reaction or Victory-Reaction.
Coincidentally, one of my earliest card ideas was for a Treasure-Reaction called Bribe (I know others have used that title for their own card ideas). The idea was to have a weak treasure that you can choose to give to an attacking player in exchange for avoiding the effects of the attack. I like the idea because it gives the attacking player a one-time benefit (he gets to put the bribe card right into his hand to play during his buy phase) for playing the attack card, but in the long run has the potential to slow him down by adding what amounts to a copper to his deck.
The card had problems--the most obvious of which is that nobody wants to buy a copper just for the chance to avoid one attack. But if the treasure was worth much (even $2 perhaps), then it wouldn't have the desired effect of diluting the attacker's deck. So in order to induce people to buy the Bribe, it had to provide some benefit when you buy it, but not later on when you had it in your hand. I tried lots of different when-you-buy benefits but didn't like any of them and eventually gave up on the card. And now here comes a set of cards with when-you-buy benefits as the dominant theme and which possibly includes a Treasure-Reaction. I'm eager to see what Donald came up with, and if Bribe was anywhere in the ballpark.
