What premature conclusions? Once again as I discussed with you prior, most of us can make predictions due to the trend PD has created and done with their games for the past 10-15 year, many mods use it and so do regular users. It's the same trend that people use to conclude that a single system cycle will have two GT games for example. Why you have yet to understand this is beyond me, you being not as accustomed seems to be the trouble though.
Also PD has never been known to fully market their product they've always been hype driven or vague, some of us would like for them to join the rest of society. Games, movies, virtually any product is introduced to some massive degree then expanded upon so people will buy it or at least consider before the release.
Why people treat PD/GT like this...
I will never know.
I still have yet to see any intellectual reasoning why it's justified in us not knowing more concrete things about GT.