Yes, it would be the greatest thing that ever happened if it's true. You just reminded me of this website:
“Each of the world's major religions contains Messianic prophecies.
Christianity, Judaism, Islam, Hinduism, Buddhism, the Zoroastrian religion and even the Native American religions all foretell the coming of a Promised One. Each of the Founders of these great religions either promised to personally return himself, to send another like himself or in some instances.... the Founder promised to do both.......
If Baha'u'llah truly is the Promised One then His appearance is one of the greatest events of human history. Are Baha'u'llah's claim true? How can we know for certain? Just take a look at some of the proofs and prophecies... and then decide for yourself.”
Prophecy Fulfilled Webpage