The Bosnian Serb leader, indicted by the UN war crimes tribunal on 15 counts including genocide, had been on the run for 13 years.
Critics say The International Criminal Court's move Monday to indict Sudan's president for war crimes may hamper peace.
Obrad Savic targets the next generation with a message about breaking accepted Balkan stereotypes.
Despite Russian and Serbian opposition, UN Secretary-General Ban Ki Moon said Friday the UN would gradually cede its role.
The document, signed Sunday, is seen as key to stability. But many issues remain unresolved.
Serbia, 2007 winner thanks to Balkan bloc, hosts Saturday's final.
The victory of his pro-EU party Sunday defied the Western view of Serbs as unwilling to let go of historical grievances. Now, a peaceful future seems possible.