Speculations at this point are mostly useless, but with two very high profile space-sims in the making (Star Citizen and Elite:Dangerous) and a dozen smaller ones listed on Kickstarter we might see a resurgence of the space-sim genre.
Space Citizen raised almost 8 mil. $ from crowdfunding alone and that is about 60-75% of the budget of a typical AAA game (single platform). This shows quite a large interest for this so-called "dead" genre. It also generated a lot of media attention so if any one of this games is succesfull, big studios an publishers will jump on old and new franchieses in the blink of the eye. So it makes sense, if that happens, that Koch Media will resurrect in some form FS. What form that "resurrection" will take is anyone's guess right now. One problem is that DeepSilver has quite a history of releasing buggy games (i.e. Gothic 3, Dead Island, Risen), on the other hand, even those games were quite good in their own rights.
One caveat... there is no mention, as far as i know, so far, that KochMedia actualy brought the rights for FreeSpace. From what i remeber
does not own the IP rights for FS so..