A bit about selection process:
in Athletics and Boxing, whoever wins the quota should to go Rio without any question
in Archery, Shooting, whoever wins the quota most probably will be sent to Rio,
in Taekwondo, those who qualified through ranking can only be replaced by someone in top 20, in this case Iran has athletes in top 20 in all 3 weights but coaches made it clear than Ashourzadeh, Khodabakhshi and Mardani will go to Rio unless they get injured.
in Cycling, they will announce them after the Cycling season in Iran,
in Weightlifting, they will announce the team few weeks before the games, right now they have 15 weightlifters in the camp but likes of Rostami and Moradi are already safe.
in Wrestling, they had series of trial events and after that they announced a very short list of wrestlers for the final trials in April. in freestyle it will be mostly between two wrestlers in each weight except for 86kg where 4 wrestlers are in the list. also in 125kg they won the quota just today, I'm 99% sure it will be a wrestle-off between Hadi and Ghasemi. in Greco-Roman Abdevali is already selected, we will have a wrestle-off in 98kg and in 85kg, there are 6 wrestlers in the list to wrestle for the spot. beside that they won the 66kg quota just today, I will wait to know their decision about it.