I am just playing WC2 again and when I look at SC flightmodel/combat I kinda like WC2 more. Mostly because its not so overly complicated and just the thing for one or two missions in the evening while SC/SQ42 seams more like something you have to work for and have to take more time to get into and become good at.
My point, a WC game in the style and quality of WC2 with a simple flight model and a good story, even if presented like WC2 cutscenes, might be the thing people are looking for.
The oldschoolers for the nostalgia and newer players maybe to have an easier access to the genre. Overall in comes down to gameplay and story I think.
If you could deliver that, I think you might have something that might sell well, not as good as SC or a AAA title but well enough.
Question is could you convince EA that it would keep the brand alive and ready for a future big budget project. Hell if necessary bundle it with a short story/comic and some toys ^_^
As for involving Double Damage...let them finish one project first. When you have a good running prototype ready, maybe even generate a big of a following with it, it might be easier to convice them to put further work into it.