First, there will be no SH6. Second, considering that the series has gotten worse with each new version, why would you want one? Third, Silent Hunter was born as an American WW2 Fleet Boat game. Fourth, They haven't gotten WW2 right yet. Fifth, there are some good modern sub games out there already. Sixth, someone else might create a new modern sub game, or WW2 sub game, but it won't be called Silent Hunter, nor should it be. Sixth, a quick search of the forums will show you that this has been discussed before.
http://www.subsim.com/radioroom/show...=Silent+Hunter
http://www.subsim.com/radioroom/show...=Silent+Hunter