Here's a thought: Start the NFL Europe back up. 8 teams minimum. 12 or 16 would be better. Let them play a season similar to the College schedules, with similar bowl games, formats, etc.
Personally, I would look forward to the English/French matchups, especially if they built a stadium at Harfleur, Crecy, Poitiers or Agincourt. But that's just me.
The German/French matchups could be played at Ypres, Verdun, or the Somme. Perhaps even have a match every four years in Belgium, somewhere near the Ardennes.
I'm thinking that there are all sorts of possibilities with this.