Any release of the hostages would bring at least a six week cease fire and repeat for Gaza. Yet threre is also a Palestinian prisoners dimension. 
Head of Palestinian Prisoners Circle Kedura Fares reportedly gave rare  interview on Sunday  to PA official Ma’an News Agency saying in return for 25 Israeli hostages released in first phase:
—48 Palestinian prisoners who were released under the Shalit deal of 2011 and then rearrested by Israel will now be released again. 
—Fares reportedly said 200 —another report says 150—who were convicted of life sentence for terror will be released but to be exiled likely to either Qatar, Turkey or Egypt. 
—Another 1000 for lesser offenses including people under 19, women and elderly also to be released. Saudi  TV network Asharq also has a similar report. 
No confirmation from Israel nor is this likely to come before a few is struck. Stay tuned.