They don't really need a new engine to do anything. Trying to read between the lines, I think that the point of rebuilding the engine is to make it more easily expandable(or "flexible")and more detailed in the modelling system; some specific examples I've heard mentioned: no more universal turret sizes, and individual tracking of the load of every infantryman. Those are just two things I've noticed MadMatt mention.
A new engine would not be for the purpose of adding in new types of units or weapons, or different types of terrain. In fact, when the new engine comes out, people may be surprised at how little change has occured...all speculation, of course.
Wouldn't be a whole lot different from fighting in the Russian steppe. Except the infantry in North Africa could actually take it. And of course Tunisia wasn't desert.
And also, if you discovered that really don't like desert warfare, then you'll be able to play the Sicily and Italy scenarios.
[ November 11, 2002, 11:30 PM: Message edited by: energy76 ]