I don't know if making a Shrek pinball from FYG and 3 versions of Nascar/Grandpix / Dale whatever Jr was
a great idea (theme wise) but at the same time I did think  when Stern made Elvis that they did miss a Chance
of doing a limited run of  different bands so that they got more appeal hence more sales

I think a limited run of ACDC, Metallica, maybe even a new Kiss game would have sold ok

 and follow that doing one   new band each year say 500-600 games at a time