As to this

1. Alma 7: 8
     8 Behold, I do not say that he will come among us at the ^atime of his dwelling in his mortal tabernacle; for behold, the Spirit hath not said unto me that this should be the case. Now as to this thing I do not know; but this much I do know, that the Lord God hath power to do all things which are according to his word.
2. D&C 132: 66
     66 And now, as pertaining to this law, verily, verily, I say unto you, I will reveal more unto you, hereafter; therefore, let this suffice for the present. Behold, I am Alpha and Omega. Amen.