Elijah the Prophet, was great, is great, and will be in the future. Known in Part-1 of the Word as preforming miracles, and being taken away by a strange vehicle. Elijah was much more: Major statements have been fulfilled, and He plays a major roll[sign] in the return of Immanuel-Christ-Jesus.
It is important to note that Elijah is of the House of Jacob. It is difficult to ascertain what Tribe, or where exactly He was born[Tishbite]: this is not an oversight. Throughout His life, He was a mighty warrior for the LORD, fighting against Idolatry. Elijah was concentrated among the Ten-Northern-Tribes.
The Prophet Elijah was very bold - quite possibly the boldest of all of the Prophets[1Kings]. Mal4:5 Elijah's return is a True-promise, and a True-sign. John the Baptist was a Type: He came in the Spirit of Elijah! John stood against the Serpent-seed, the Brood of Vipers, until his death.
Present and accounted for on the Mt. of Transfiguration, meeting with Immanuel-Christ-Jesus was Moses, and Elias[Elijah] the Prophet. Moses representing the Law; and Elijah representing Prophecy - and all of the Prophets. Neither of these Two died, or received a burial: GOD simply removed them, for a special time.
Rev.11 is the-time of The-Beast: It will have five  months, which is also the time of the Locus, for those keeping score; "to deceive the whole world." At the same time the LORD's Two-Witnesses will be in The-Beast's face speaking against It - just as Elijah and John did.