I seriously doubt they will make a V6 mk3 Clio. Usually manufacturers make cars like the Clio V6, Escort Cosworth, Focus RS as a tool to generate interest, and traditionally due to the limited numbers built, and the massive development cost, they end up losing huge amounts of cash.
Only Subaru & Mitsubishi seem to have turned the exercise into a profit, but at the same time their cars have lost any idea of exclusivity.
I think the V6 mk1 & 2 have done the job in rasing the profile of the RenaulSport division, and theyll probably now leave a more mass-market 5 seater 2.0 200bhp model to do the job of being the flagship for the Clio mk3 range.
I doubt well see the likes of the Clio V6 again, and I would personally stake my entire posessions that the Micra V6 will never make it into production.