As we know there are fourteen Lokas. And Mahabali was made King of Sutala by Lord Visnu's Avatar, Lord Vamana and Lord also promised to make him Indra. So I wanted to know if his time in Sutala has come to an end.
As mentioned in What is the life span of the people who are living in lower planetary systems (from Atala to Patala lokas)? post, Sutala comes under बिलस्वर्ग (subterranean heaven) and fear of old age and death is not there.
Also, SB 8.22.32 mention:
Until Bali Mahārāja achieves the position of King of heaven, he shall live on the planet Sutala.
As per Vishnu Purana and many other sources, Bali Mahārāja would become Indra (post for king of Devas/heaven) in next i.e. 8th Manvantara.