As I noted in a previous post, I have changed the set symbol from a sunburst pattern to trident-like pattern. The main reason for this was that the sunburst pattern bears far too much resemblance to the ankh pattern found on Necropolis Park cards. The small font cuts off the bottom of the sunburst. The trident symbol was much more distinctive, and still looks cool, so I went with it instead.
Also, the first two cards released both reference "cursed" cards. Cursed cards have both positive and negative effects. For example, a cursed Command Card might reduce Vitality for each creature under it and slap them all with a Cursed label. Reducing Vitality is similar to the effects of cards with negative numbers like Rye Beaner. This means you can get more creatures under Shield but also means they will be weaker in combat. And some cards are specifically built take advantage of having a Cursed Command Card or when matching up against Cursed Creatures, like the first two cards of the set, Deathknight and Inquisitor.
Some cards from Champion's Odyssey are going to be re-released with Cursed effects or labeling, such as Mummy's Curse and Possessed!