So when we stood back and analyzed what Zendikar Expeditions had done, we realized that it made Standard more accessible, it got players access to older cards, and it provided alternatives for deck building. It wasn't a total solution for every challenge, but it helped address all of them. This, of course, led us to ask, "Is this something we should be doing more often?"
We had a lot of meetings where we discussed all of the ramifications of turning Zendikar Expeditions into an ongoing promotion. We talked pros and cons and benefits and detriments and everything we could think of. In the end, we decided that it made sense, and the Masterpiece Series was born.