This is the braincase...
I do expect that Electronic Arts will revisit the IP in the future (maybe even by E3?)... but not like this. A 'First Decade' style collection for Wing Commander would be a much more complicated beast -- and a less attractive one for the general market, for a number of reasons.
The age of the games makes it more difficult to sell to a modern audience... and harder to develop in the first place. Not only is it harder to update a DOS game for a modern computer than it is a Windows 9x C&C title, but they have access to very little of the original development material (source code, original art, etc.)
It's also the wrong audience: given the amount of money the next Wing Commander game will require to develop, it will be a console title first (and a handheld title second and a mobile title third and a PC title maybe fourth.) Releasing a collection for the PC to test the waters when you're going to be selling something to a different audience entirely just doesn't make sense.
(There's also the same issue that helped kill the series in the first place - the perception that space sims need flight sticks... releasing a classic collection will only help cement that belief rather than ween everyone over onto an Xbox 360 controller...)
The 'unreleased title' bit shoots this to pieces, too - there's no original Wing Commander title lost in the void... and if there were, EA wouldn't have access to it, since there's no archive of Origin's development material in place.
All of the 'lost games' are ports - Wing Commander 2 SNES, Wing Commander 3 Saturn and Wing Commander Prophecy DVD. The two titles that were announced and then cancelled (Privateer 3, Strike Team) were many months if not years from release... and millions of dollars of development money from being finished. Others that we 'know about' weren't even announced... and were even further from being finished (Privateer Online 1/2, WC FPS, etc.)
Privateer 3 and Privateer Online were quite far in development AFAIK. I think I even still got a PC mag that has screenshots of one of them.
Most of the art in that magazine are renders - a lot of concept art and some development of the engine was done for Privateer 3... but we're talking about an FMV game that was cancelled before the film shoot even took place -- it's hardly sitting on a disk waiting for modern audiences to run it.