The idea of a French Super League is quite good maybe not so much French but probably more central European SL with a greater proportion of French teams + players. Not saying it will eventuate but supposing it does there must be a team in Paris, Toulouse, Marseille, Lyon.
My stance is that Personally i think a team in Luxembourg would be ideal, could draw a decent number of spectators from the surrounding region. Luxembourg being the banking capital of the world you could probably at least get bidding for sponsorship amoung any companies?
others to consider Brussels, Strasbourg, Frankfurt heaps of companies, Cologne Massive potential huge surrounding pop within short distance plus big city.
further South There is even more Potential a Swiss team? any one of Basel, Zurich, Bern, Lausanne, or Geneva could possibly support a side. Switzerland has plenty of companies and money, not sure though on laws cos there not part of the EU. As far as Italy is concerned either city of Milan, Genoa, or Turin would be fine all have industrial companies if i remember correctly so potential sponsorship.
Other places in France personally would like to see a team in say Chamonix would be pritty good in front of Europes tallest mountain would be pritty cool, Monaco also would be ideal lots of companies there , if not Nice Cannes, or St Tropez, must have 1 in that region. Elsewhere possibly a team in Nantes or Rennes in the North west. Possibly also a team in Limoges, or Bourdeaux. Maybe even Andorra have money and they've got a good expat community and am pritty sure they have a Union competition there?
Basically the 4 French cities Luxembourg, 1 of the other Nthn teams Mentioned, 1 Swiss, 1 Italian. Riviera, 1 N West France, 2 South France, Chamonix (option)
So Possibly around 12 teams if it's going to be Professional thats realistically where the teams are going to have to be otherwise it's not going to get the funding. Basically it's dependent on at least a tv Audience which is what sponsors will look for. Unfortunatley realistically you wont get sponsorship for some of the current sides in the top French division they must be overlooked if sponsorship can be obtained elsewhere. This model proposed of course would only be acceptable should sufficient Sponsor money be attained.
The only problem one might have to overcome is getting some players from Italian German and even French Union Sides to make it work better. Would need some initial outlay but depending on things after 1-2 years you could tell if generally it would be finnacially succesful and League Beneficial.
I know it's very brief please dont tear me to shreds.