Board Thread:Game Discussion/@comment-9605025-20130516184618/@comment-8284783-20130516204012

It is based on previous event. It is only speculation if you want to think (hope) that maybe someday they will do "revival" events (something I'm actually hoping they do, because I'd love to get me some cool dinobots :P)

But so far, it looks more likely they will instead do a re-iteration of a past event's theme (like "Day of the Dinobots... 2!") so it's likely the cards will all be different.

I'm still hoping it will be possible at some point to acquire past event cards, especially with the current reward payout which gives you only one half of a character as a prize... : /

(yes, I'm bummed out I'll be missing out on Hun-Gurr alt form D:)