To clear things up, when we say First Quarter, that means that it will be somewhere between January 1st and March 31st, 2015. This is completely tentative. It could very well come after that, completely dependent on how quickly development goes on what comes up.
We haven't really started the Spirits plugin yet. We've spitballed ideas months ago, but RPG is our current focus, and will be for a bit. We opened this section of the forum just to collect ideas and feedback for when we do eventually begin development.