You are completely guessing that. When Diablo 3 came out did Blizzard rerelease the first 2 with fancy graphics? When X-COM Enemy Unknown came out did UFO Defence get a remake? Have we seen a remake of System Shock 1 or 2? No. We haven't. Because that doesn't happen every time a series gets revived, and it's silly to say that it's definitely happening.
10 to 15 (even almost 20) years ago when those games were popular was before publishers turned to the "money first, gaming second" mentality. Today if a product makes bank, then the parent company will string a franchise along for as long as it can. To think they won't wring Deus Ex dry is wishful thinking at it's worst.