Venturing into MTB market might be fairly risky to Campy. Their philosophy and the appeal do not seem to mix very well with the typical MTB crowd. Plus MTB parts tend to be cheaper than road, hence their pricing disadvantage is even more acute. They are fairly boxed in as a boutique brand right now. Their best bet is to expand into the OE road market. When we have 1 Veloce equipped bikes for every 3-4 105 equipped ones, that will be a sign of some improvement.
One particular stat I am interested in (Madcow?) is, for every $6K+ bike (or $3500+ frame) sold, how many $1500-2500 bikes are sold? I suspect that number will speak volumes.
Well, to give you an idea in the US 12 month period there were approximately 340,000 "Road Bikes" sold. Of those bikes only 2,438 were above $6,000, roughly .7%. Not many. Sub $1000 accounted for just under 36% or 121,500 units. If I include all road bikes sold under $2000 you're looking at 80% of the market.
Also, your assertion that MTB parts are cheaper is not correct at all. Material prices are material prices. While the avg. MTB sold is much less expensive than the avg road bike this has to do with how the "styles" are positioned in the market. Placed where you can see this are areas where the style and functionality are similar between the to styles. Cranks, chains, cassettes, etc. A Dura-Ace and XTR are roughly priced the same. Even with wheels you can see some price parity.