Like I said in reply #2527, Zagreb and Sarajevo are now officially confirmed.
All details incl the schedules here:
Link
Zagreb is a 12:30 return trip. If I'm correct that is just 15 minutes short of the max FDP. Sarajevo is 30 minutes short of max FDP. Turnaround at Zagreb is only 45 minutes. (Sarajevo is 50') Interesting...but I like it!
Planned flight time to Zagreb 6:20hrs!