Here are links to the visual spoiler, as well as to purchase the cards for yourself.
The core set contains 237 unique cards in 6 main card types, ships, aircraft, weapons, defense, resources and instants. This game utilizes icons to represent card types and abilities for each card, and the cards have been streamlined to be held in a poker fan and still see the type and cost of all your cards without having to compromise your hand to other players.
The first expansion will contain 111 new cards in the 6 main types, and will feature European, Russian and Chinese ships, weapons, aircraft, radar systems and resources. Check back often as the new cards will be revealed over the course of the next few months leading up to the release date.