If the study is successful, I believe it would be medically unethical not to release top line data.
Sleven,
You could make the case. But... Jesse Livermore (you old timers will remember who....) believed it would be unethical to not roll the placebo REDUCE IT group over to V at the interim. The night before they released the results, we were all squinched up hoping/praying to get 7% reduction since nothing had been released and of course they were ethically obligated. We got close to 4 times that. Double blind studies of gawdawful diseases stay sealed/opaque until conferences/scheduled releases.