Thanks for your replies,
I’m asking this because during “The International 5” a Dota 2 event organized by Valve. The panels were updated after the beginning of the game with the portraits and the skills of the heroes chosen for that match. But I guess it was done “manually” 
it’s kinda sad. A friend of mine told me Riot has done the same with League of Legends during the WCS for example.
There is plenty of cool things to think about with this kind of stuff ! I hope we will be able to have an answer from the dev’ team 