When do you play it?
Using the leagues suggested for the league Ireland, Norway and Sweden have summer seasons while Scotland and Denmark have winter seasons. Plus you have you European games to fit it round. You would probably be looking at teams who are in Europe being excluded so teams from 4th down qualifying. Cannot see that drawing in sponsorship. I am old enough to remember Texaco cup and Anglo Italian cup in England and both collapsed due to lack of fan interest. Cannot see this being any different.