Purely speculating here but... It seems ED is focusing now on getting the L-39 and 1.5 ready for release by the end of September, which is approaching, rapidly. After that focus will likely shift to getting the features polished and NTTR blocking issues taken care of for a projected release of 2.0 and NTTR Alpha by the end of the year. It's likely we won't hear much news about the Spitfire (or even P-47) until after 2.0 and NTTR are in the hands of the public. Not to say that there isn't progress being made, I think the last update we got from Matt on the Spitfire was that code was being written, not much to show. Probably Q1 2016 for a more cumulative update. Just my guess.