1. Obviously the timeframe. If like @Fuji Maru Kagurazaka said they are starting their trails by the end of the year how much will the trials last?
You can't predict that well what the future holds, are there problems or not?
2. How many phases?
If you want to release something, then its at least phase III for EU, Japan have their Phase II exception
for instance the Phase III
Phase IIIa: Trials conducted after efficacy of the medicine is demonstrated, but prior to regulatory submission of a New Drug Application (NDA) or other dossier. These clinical trials are conducted in patient populations for which the medicine is eventually intended. Phase IIIa clinical trials generate additional data on both safety and efficacy in relatively large numbers of patients in both controlled and uncontrolled trials. Clinical trials are also conducted in special groups of patients (e.g., renal failure patients) , or under special conditions dictated by the nature of the medicine and disease. These trials often provide much of the information needed for the package insert and labeling of the medicine. Phase IIIb: Clinical trials conducted after regulatory submission of an NDA or other dossier, but prior to the medicine's approval and launch. These trials may supplement earlier trials, complete earlier trials, or may be directed toward new types of trials (e.g., quality of life, marketing) or Phase IV evaluations. This is the period between submission and approval of a regulatory dossier for marketing authorization.
3. Can they give a ballpark estimate when they could push it to the market?
Same answer as the first, its hard to predict the future.
The question at most seems pretty weird, when you think about the timeframe there have been with other trails.
Can you predict a price 5 years into the future? with inflation taken into account and what not.
Its fine that people want to send question to researchers, but they should at least be relevant to present time and near future and not questions that are years away.