I would love for this to happen, but it's hard to see why Ferrari would change its ways. The cost would be enormous and I'm not seeing the return.
I respectfully differ ... Ferrari is pouring money into F1 with dismal results. I see a return of Le Mans racing for many manufacturers ... the old saying that winning races sells cars seems to be something that makers like Porsche, Aston, Jaguar, Chevrolet, Nissan, BMW, Audi, etc are finding to be true. For example, I enjoy F1 racing, but doubt it sells many cars for Ferrari. It might sell t-shirts and posters, though. I believe if Ferrari could mount a successful effort and say win the manufacturer's championship over say, Porsche ... it would boost their desirability higher than now. IMO, I much rather see Ferrari focus on Le Mans series rather than F1. I think F1 has reduced itself to selling of beverages (Red Bull Team) and becoming the venue of far off locations to attract tourists (e.g., Dubai and Bahrain). I would love to see Bernie Ecclestone keep his circus and let's have a race series that is open to more manufacturer's. I would much rather see a Porsche / Ferrari rivalry than a Red Bull / Ferrari one. I can't drive a red bull.
Just to reinforce some points ... Virtually all innovation in F1 is aimed at aerodynamics. The rules are becoming or are already very stiff (I think they are moving to V6 engines soon). There is virtually no innovation in F1 which is applicable to road cars. On the other hand, LeMans series cars have more relaxed rules, the innovations is on longevity of the noisy bits and bits that go around circles (engines, transmissions, tires). They have lights and windshield wipers in LeMans cars.
Last year, Porsche made a choice to do F1 or LeMans ... they are choosing LeMans, they have hired Mark Webber away from Red Bull. And Porsche says LeMans is less expensive than F1. I think it is wise move and it would please me to see Ferrari do the same. Maybe the home team (i.e., Fiat) will enter LeMans wtih Maserati.