Winter Soldier has been cancelled as of issue 19 which will be released in June. I first noticed in the July solicits that there was no WS 20 and Latour posted a blog out the book being cancelled today. It's really sad that he and Nic Klein were only given on arc on the book before it got axed but sales were down (only 20k last month).
I will definitely miss this book as Bucky became my favorite character back before he became Captain America, and I am sad to not be able to have an ongoing featuring him. I felt like his book was always unique to the rest of the Marvel U and that it was a good thing. I hope that his portrayal in Secret Avengers is good, and that Jason and Nic have a chance to come back to the title sometime.
Let's hope that the movie can keep him relevant and give him another chance at an ongoing, but I won't hold my breath.
Edit: I also hope this is not the end of Nick Fury as this was his only regular appearance for the past year or so.