Win a decoration flag this summer ?!? Add foot adventure

Hi all !
I just check the news that after 2 weeks we will have the foot adventure avalible to buy at guild shop with guild coins ! So great news maybe ?? But I start playing before 7 months and don't know how to earn decoration flag.

So I have a clear question - when we do the football adventure will we win a flag at the and ?? Or what ?? Mean How all high level guys won a decoration flag ? I have several friends that have even 4-5 flags lol... So can we win decoration flag this summer or they will stay just in low number ?

Thanx to make it clear. If after each foot adventure we won a flag will be great , but I don't know what adventure drop...

I imagine the next chance might be during the World Cup, however the flags might be the teams that are in the World Cup rather than the flags that were on offer for all teams that were in Euro 2012