Baha'u'llah is the Godhead who had sent the other prophets.

One faction of Iranian emigrants to the U.K. in the 1980s and early 1990s led by a Cambridge-trained Iranian scholar even developed a doctrine that Baha'u'llah was the Godhead who had sent the other prophets.

Juan Cole, Review of Religious Research, Vol. 43, no. 3 (March, 2002)