The more I read up on this FB20 boxer engine the more I'm keeping my mind on exactly 200hp.
http://www.caranddriver.com/news/car...-four-car_news
It says the FB20 that will be put into the new Impreza should be pushing roughly 148hp in the econobox version. The FB25 is basically the same output as the EJ25. My guess is that with Toyota's D4-S system, and further performance refinements, 200hp will probably be the max they'll get out of it without suffering too much in the MPG/emission / drivability departments.
148 -> 200 is quite a leap in N/A form using the same engine, let alone 220 or 250.