Why there won't be a long distance train across the strait?

Test running begins on European Marmaray alignment
http://www.railwaygazette.com/news/single-view/view/test-running-begins-on-european-marmaray-alignment.html

I wonder if long distance trains will run through the trans-Bosporus railway tunnel. If it's possible, it will be one of the biggest railway history in Turkey. It means there can be trains between Europe and Middle East via Turkey.
But, there won't be any passenger train as such, judging from the fact that Orient Express suspended its operation.