Hideo Kojima apparently made mention of this on a recent episode of his podcast. We here at TGN do not speak Japanese outside of a few things we learned back in elementary school. As such, you'll just have to rely on the word of Platinum Games' Creative Producer, Jean Pierre Kellams.
I am excited to see Rising hit the PC.
Release date? Who knows? Will it include the already released DLC for the consoles? Your guess is as good as mine right now.
What is known is that this game is well worth checking out either now on the consoles or when it eventually comes out on the PC.