Judging interest

I’m considering making a Fun Cup of some description, and am currently considering the following cars:

Formula Ford Ecoboost 200’s with upgrade tune provided by myself
Mazda MX-5 Cup cars with upgrade tune provided by myself
Mini JCW Works GP’s, own tunes
1965 Austin Mini’s with your own tune
Austin Mini’s vs Original VW Beetles
Renault 5 Turbos with tune by myself.

I just want to gauge interest with what you’d all be most interested in. Seeing as the Summer is, well, here, I thought it’d be a good idea to get a series going…

What are your honest thoughts and suggestions?