Audi R4 and NSU TT: Is Ingolstadt readying new mid-engine models?

It may be the case that Audi's foray into the midtacular* world of mid-engine cars won't end with the new R8 super sports car. German outlet Autobild claims that Audi is considering a smaller mid-engine sports car called the R4 that would obviously make life a little harder for the Porsche Cayman and Boxster. It's also claiming that Audi may revive the rear/mid-engine NSU TT, the car after which the current TT was named. The original NSUs were much like the European version of the Corvair, featuring rear-mounted air-cooled four- and two-cylinder engines. The hotted up version was, of course, called the NSU TT. It's hard to tell through the garbled Google translation how solid any of this information is, but we're certain the success of Audi's mid-engine R8 will play into Ingolstadt's future product plans.
*"midtacular" on loan from Comedy Central and The Daily Show / The Colbert Report. We have to give it back before tonight's episodes.

[Source: Autobild via German Car Blog]