Note: All credit regarding this information leak goes to XOF.
Among these, are cards owned by the protagonist Jaden Yuki and other prominent characters such as Aster Phoenix, Chazz Princeton, Alexis Rhodes and Bastion Misawa, meaning that they might be the first unlockable characters once GX is added. The datamine also shows the rarity of some cards and how duelists could get them.
Zane is a powerful duelist from GX series, his deck is themed around Cyber Dragon and it's other forms and fusions, his deck then centered around both Cyber Dragon and Cyberdark later on in the series.
Like what? All his anime-exclusive cards are garbage. The last couple of decent ones (Litmus Doom Swordsman and Living Fossil) just got released in the TCG/OCG. His best card that remains anime-exclusive is Plasma Warrior Eitom, which is just a much, much worse Anki.
Here's the first thing wrong with this
3 of those cards are character level up / duel reward cards already so they're not gonna come in a box and second this is for into no offense but spark an is the same way and bladedge came out with wildedge and plasma vice in valiant souls but then again I'm probably just late to the punch
And your point is what exactly? There's a lot of voice lines. The newer characters (GX characters, and a few newer DM characters like Arkana) have a lot of lines for cards that obviously won't be included for a long time, if ever. Jesse has one for Crystal Abundance, and a lot of anime-only cards. Arkana has a line for Pandora's Jewelry Box, a Pendulum Monster.
I used to just think that voice lines meant that a card would come, but now I think that they probably just had the actors/actresses record a lot of stuff just to have the lines ready in case certain cards get released.