Hi Ray, welcome to the forum! I believe there are some discussions on this topic over in the Home Theater Software section. From what I've read, it appears as if the BTTF Trilogy will be released this year.
Welcome to the forum. If you do a search for Back to the Future or BTTF in the Home Theater Software section of this site, you should be able to find all the information you want and then some. Also, check out bttf.com for news and rumors.
The recent rumors are that it isn't coming out this summer anymore, but possibly December. Universal says there isn't enough time to get it out by this summer, so it's going to be December. But keep in mind that this isn't confirmed by Universal. www.bttfmovie.com is up now if you want to check it out.