This just got in today. A user in the Mtg Salvation’s Rumor Mill posted massive scans of the cards of Return to Ravnica. It seems that this will complete the spoiler list in no time. As I have check each of the cards, it seems that most of the commons are highly costed with just ordinary abilities. Keyrune artifacts are good addition for any guild based decks, and I’ve spotted only a handful of good creatures to include on my planned decks.

You can check the progress in this thread. Also, the spoiler page is currently being updated at 239 cards revealed already.

I guess it’s an early call to practice Limited.