No, I don't. I think the Ngage is going to need a marketing pitch. They're going to emphasize that it's available for some S60v3 devices, but there's also going to be some devices that are better suited for Ngage, such as the N95 and N93 (3D hardware acceleration and TV-Out). Thus, I think it's highly likely that they release some special edition devices to coincide with the launch.
Just a personal opinion. It's not that the N95 NEEDS to have "Editions", it's that they need to use the N95 to get people on board with the Ngage thing. I also wouldn't be surprised if they came up with an Ngage Bluetooth Controller to go along with it:
http://symbianguru.typepad.com/welcome/2007/03/first_new_ngage.html