I don't know how I missed this, but on April 30, 2015 the Wikipedia page on Lost in Space was updated with the following addition.
"On October 10, 2014, it was announced that "Legendary TV" is developing a new reboot of Lost in Space and they have hired "Dracula Unborn" screenwriters Matt Sazama and Burk Sharpless to pen the new epic. As of April 2015 no further word has been officially released regarding the project, however as Kevin Burns of Synthesis entertainment is involved it can definitely be considered a serious project. Fans are hoping that this time the show will be serious "hard" sci-fi in approach and that the main features, such as the overall look of the characters, the design of the Jupiter 2 and other hardware, as well as adherence to the original musical style, will remain as faithful to the original apart from relevant upgraded detailing."
It's still early days, but I'll be looking out for more news!