December 3rd, 2014, 08:22
If you read Dovetail's announcement, it mentions two distinct things. First that they are putting FSX on Steam and second that they are using something they licensed as the basis to develope a "new" sim/game to be released as early as next year.
It's the second part that fueled a lot of speculation that they may be further developing FLIGHT to release it in some new form. If you look at how MS wanted to distribute FLIGHT it seems tailor made for a venue like Steam.
Time will tell.