Patch 2.55 new card NPC's and changes to rules & card sets.

[Nyalia]

There are no new cards.

I'm willing to bet that the eight cards in the Platinum Triad Card packs will be:
Lightning, Cecil Harvey, Firion, Tidus, Zidane Tribal, Warrior of Light, Terra Branford, Bartz

Zidane and Warrior of Light are the super rares from the Gold packs, and Terra and Bartz are the super rares from two of the Hildebrand trials. They all fit a theme - "main" character from a Final Fantasy. I highly doubt Cloud will be given away for free given how much he costs, and Squall and Vaan are achievement cards so they can't be in there. We have:

• FF1: Warrior of Light
• FF2: Firion
• FF3: (Onion Knight? (reward from World of Darkness))
• FF4: Cecil Harvey
• FF5: Bartz
• FF6: Terra Branford
• FF7: Cloud Strife (1m MGP card)
• FF8: Squall Leonhart (Achievement card)
• FF9: Zidane Tribal
• FF10: Tidus
• FF11: N/A
• FF12: Vaan (Achievement card)
• FF13: Lightning
• FF14: Godbert Manderville

That's eight "main" character cards that aren't achievements or MGP purchases. I know, I know, you can argue that Terra isn't the main character of VI and Lightning isn't the main character of XIII, but they're the initial focal characters and the ones used to promote the games, so they're close enough. (The two not-really-main-characters are also, unsurprisingly, the only females of the set, but that's a discussion for another forum.)