The Two Witnesses of Revelation - Enoch and Elijah

Could the two witnesses of Revelation really be the prophets Enoch and Elijah?

Revelation 11:3-4 And I will give power unto my two witnesses, and they shall prophesy a thousand two hundred and threescore days, clothed in sackcloth. These are the two olive trees, and the two candlesticks standing before the God of the earth.