“Expected One,” “Coming One,” or “He who is coming” are typical ways of translating the everyday Greek word erchomenos. Because it is such a common expression it is hard to know when it is being used in a significant way. One strong clue is when it occurs in messianic prophecies like Daniel 7:13 and Psalm 118:25-26. Some people in the New Testament (like John the Baptist) seem to have used it like a code for Jesus Christ, the Messiah.
Expected One in Greek:
Strong’s Concordance number: 2064
Bible references: Matt. 3:11; 11:3; 21:9; 23:39; Luke 7:19-20; 13:35; 19:38 (the King who comes); John 1:15, 27; 3:31; 11:27; 12:13; Acts 19:4; Heb. 10:36-38; Rev. 1:8; 4:8
As for me, I baptize you with water for repentance, but He who is coming after me is mightier than I, and I am not fit to remove His sandals; He will baptize you with the Holy Spirit and fire. (Matthew 3:11)
Now when John, while imprisoned, heard of the works of Christ, he sent word by his disciples and said to Him, “Are You the Expected One, or shall we look for someone else?” (Matthew 11:3)
Matthew 21:9; 23:39; Mark 11:9; Luke 13:35; 19:38 and John 12:13 all quote Psalm 118:25-26. Hebrews 10:36-38 quotes Habakkuk 2:3 where the original subject is the prophetic vision rather than a person. Revelation 4:8 quotes Isaiah 41:4. All the Old Testament passages include the Greek word erchomenos.