Best thing you can do is

Not fall into the complacent lackadaisical work ethic that we had on Hearthpwn in the last few year. Content quality fell a lot in the past year.

Use this new found energy to keep the site lively and thriving. Create content continuously and not just when a news story breaks from Blizzard. You can't build a site on news alone. Articles about CCG's in addition to news would be great and more of a reason to come back. Inspire discussions and interest. DIg deeper into the games beyond just pasting Blizzard press releases and have actual articles about the games. So many topics that can be explored beyond nerfs and new cards. It will get people more involved in the site and coming back often. A great model is 'Blizzard Watch' and what they do and they are a successful website that was created from a corporate entity shutting 'WoWInsider' down.