He's looking at offers apparently and will make a decision soon. If he plays for half a season in Hungary or something, I can see him play one more season in the ISL. He's hinted at the ISL thing more than once before he left India.
The ISL was a two and half month league with matches almost every three days. Most of the older players found it hard to keep up with the pace (or rather frequency) of the format. By the time Del Piero found his form, the league was already over