After reading this topic started by @Lare: Why is Paris region so inactive?, I have to say that, even though there aren’t many real life commercial routes (I found one of Easyjet between LFOB-LFPG), the region has many airfields (not talking about the military ones), which could be used by propeller aircraft, like the C208, C172, SR22 and others.
The military airfields could be used to recreate battles from WW2 with the Spitfires and Lightnings.
Adding to the points above, the region is as large as London, so there wouldn’t be any space constraints in that area.
Last time I saw it being used was in the A320 certification event.
What do you think guys, shouldn’t we give Paris some use?