There is a precedent for resurrecting a card game due to fan interest. : http://www.animenewsnetwork.com/press-release/2014-07-24/original-dragon-ball-z-collectible-card-game-returns-after-ten-years/.76994
the intersting thing is. the guy who ended up bringing this back (the brand manager for panini) also plays overpower. I've played him a few times, myself. Of course Panini would never end up with the rights for overpower but we can dream
For anyone interested in this game (I played the old one extensively and helped develop the new one), there is a message board at z-warriors.com
Support it if you can!