The German's don't particularly like Honda, and they love to see the New NSX fail. BMW is always a step behind in Engine Technology (until the current generation V10). Many will argue about the IN-line six in the M3, but that engine has been around for a decade in Europe. They might be able to make a high power engine, but they can't make it reliable and cleaning burn. 911 were the benchmark in sports car but were always lack in drivability until the 996. As I indicated above, it will be easy for Honda to built a super fast/luxo RL, very little is needed to make that car go faster, and more luxurious. They don't need 3 to 4 years to make that happen.
Three main indications that New NSX will not be in Grand Touring class:
1: In a way, there was a “none British” Aston Martin, it was called Porsche 928, and didn't work. If Porsche can't make it happen, it sure will not work for Honda. Japanese high line cars don't sell well in Europe, with the exception of LS430 (Even though Toyota consider it a success, they really don't sell that many). Therefore, Honda cannot ignore the European market if this new car is going to have a market success.
2: There is nothing more prestige than beating Ferrari on the track and on the road. Honda did not create high revving DOHC VTEC engines so they can stick it into a lazy luxury cruiser. No one want a high buzzing engine on a GT class car, they want a quiet, giant motor to match the driving experience of a GT car. Think SL55/600, SLR Vision, DB9, 612, they are not high revving cars… well, maybe the 612.
3: For JDM market, Toyota is Honda's biggest nemesis. 1/3 total NSX was sold in Japan; therefore, if Toyota building a MR, 200mph car, Honda will not let them have all the fun.
CEO of Honda has already disclosed some major details, plenty to kill any speculations out there: “We are going to replace the NSX with a sports car for the new era, with a giant V10 engine.” As Uehera (NSX/S2000 chief designer) pointed out, MR is the only way to go, because it has the best handling characteristic.