I think GOG is not allowed to make core changes in the game, they just adds some external features to play in new Windows versions and so on. But the game remain the same. For instance, in some versions of their games, the just use DOSBox to run them... on modern systems, and as you know, something so simple can be done by anyone by just reading some internet guides!
By saying this, i mean the surely wont change the way the game is presented/packed, with mpq files, etc. Every tool we have to explore War2 will mostly work!
And thats why i think it'd be possible to make a War2Combat version, from the upcoming War2GOG files, and even a better version using a mix of the better files from each version, taking advantege of quality audio and movie, etc.
I also tried the Diablo 1.09 ddraw with War2Combat and wrote about in other thread (i copy below):The Diablo (GOG) ddraw worked with War2Combat!! You even can configure the resolution with a little tool included in the Diablo folder.
All i did was copy from the folder \Diablo\dx the following files:
With dxcfg.exe you can change resolution and other things, War2 work with no lag, is cool!!!
It also worked in "Windows Mode" too with that ddraw