The two project games are going to be handled by Platinum after they finish with what they are doing with Star Fox. They covered that in an interview during the Star Fox tree house segment. As for the Devil's Third I'm guess they will do a direct for it, or the developer didn't have enough time to create demo for it, that does happen at times.
Here is an article about the Project games:
http://www.nintendoworldreport.com/news/40482/new-details-about-star-fox-zero-and-project-guard
Errr, I just went to Nitnendo's site to look up about Devil's third, currently the page isn't there, though the age varification is still up.
But it seems a few days ago it was given a release date for Japan of August.
http://www.polygon.com/2015/6/10/8762251/devils-third-wii-u-release-date-august
