Yes, this is possible. You can overwrite the template and use the following two template placeholders:
%stadium_name%
%group_name%
I have an example for the stadium name here. Just change the template HTML or position of the placeholders in the file to match your wishes.
And if you add the %group_name% placeholder, it will also show that info. One ‘small’ thing to consider however: the %group_name% will be filled with only the group of the home team. For the group phase that is not a problem, because both teams will never be in different groups. But for the final stages it will make no sense. Maybe it is best that you hide it with CSS for those match types. If you also want to show (initial) group information for those matches, you will have to overwrite the params array of the matches to add that information as well.
