No she didn't, your talking complete bull shit. She didn't say a single word about the content of the upcoming patch. She was asked multiple times and every single time she said that the only info she could share was the date. It was almost comical how little she had to say about. Here is the stream:
http://www.twitch.tv/relicentertainment/v/3866820
Please give me the time stamp that he said that
March 31rst won't reveal everything that we're working on. There is still lots in progress, things come in stages.
And so far there has been nothing, Cynthia refused to comment on the upcoming patch and every person who has dealt with Relic has said to prepare to get disappointed. Perhaps it's wishfill thinking on my part they might be focusing on reworking units and balance, but the vibe Iv gotten from them (as well as the leaks) is that the next patch won't bring new content in the form of a new faction.
They did hint at more maps being released, but weather that counts as new content is up to you.