Prophet ELIJAH is ONE as being PROMISED in MALACHI 4:5.
The identity of the other prophet is still unknown.
The "two candidates" are MOSES and ENOCH.
The qualifications of these 'two candidates' are both HIGH...
In LUKE 9:30 we can see the PARTNERSHIP of Prophet ELIJAH and MOSES in comforting our Lord and Savior Jesus Christ before His death.
ENOCH, on the other hand shared qualities to Prophet ELIJAH as the ONLY TWO MEN in the Bible who didn't suffer death, they were raptured as written in HEBREWS 11:5 and II KINGS 2:11-12, respectively.
The UNBELIEFS of the people could NOT CHANGE the MESSAGE OF GOD ABOUT THE FUTURE.... for what God has PLANNED WILL BE FULFILLED, and God has REVEALED His PLANS or the FUTURE EVENTS in the BOOK OF REVELATION - the Book of MANY DIVERSE INTERPRETATIONS, but ONLY GOD'S WORD WILL STAND....
For more, I would refer you all to this forum:
http://www.jesus-christ-forums.com/home/viewtopic.php?t=8
God Bless Us All!