Quote Gronk!="Gronk!"Whichever stadium/city offers the most money to host it.'"
That's not what it should be about. Doesn't look great on tv or for anyone attending the stadium to have it at a 60/70k seater stadium and only have 25-30k of fans there - looks like no one gives a monkeys about it.
Barcelona is just a non starter, if we can't fill a UK stadium then no chance of there!! A smaller stadium in the south of France could be an option though - gives more French fans to get to the event and British fans to have a weekend away in the sunshine, if that's what they want...