Jon, Tony Estes asked Dodge that question at the Ram SRT/10 media event. At this point, you can rest assured that Viper is the only vehicle, and it's owners, that will ever have the the cult status we presently enjoy with Dodge. So for at least the time being, Viper Club is just that , a Viper only club. If the door got opened to the Ram, under your scenario any vehicle with a Viper engine would be allowed. If that were the case, than all the hot rods out there running Viper crate motors would also be included.
What you may see one day is a PVO club? If they continue making all these hot cars, then you will need to keep them together in some fashion.