Brewpub at new DC Ballpark?

The original plans, created by architectural firm HOK, for the Nationals' new ballpark included space designated for a brewpub. Not a themed bar, but an actual on-site brewery!

I had never heard any mention of this until recently when I was told by someone who had seen the plans and sat in some meetings with HOK. He has asked to remain anonymous. What's the status of a brewpub at the ballpark? And what is the zoning legality? He didn't know.

There is no mention of a brewpub on the official Nationals website.