I am wondering the same. I was told by a local that there is not yet any word on whether a fan zone area will exist or not. But if so it will be located in Błonia, which is 2-3KMs from Grand Market
If they do it, i doubt it would be on The Blonia, if it is its' only just over 1km walk from The Main Square (No idea what or where 'Grand Market' is)
You can check "Small Square" as well. There was a fan zone during various championships (sports disciplines). It's just behind the Main Square and St. Mary's Church.
Very interesting. Thank you for the replies!
Błonia (al. Focha)
At least according to the newspapers. 9x5 m screen, room for 1000 people, food trucks.