It may be of interest to know what Baha'u'llah and the central figures of the (Haifa based) Baha'i community have said about himself and his fore-runner the Bab (please note I consider all the following claims dubious);
Baha'u'llah said of himself, "This is the One Whom the heart of the world remembereth and
is promised in the Books of God, the Mighty, the All-Wise' 1
Baha'u'llah has explicitly identified the Torah, Gospel, and Quran as Books of God according to my understanding as well as claiming to fulfill Zoraostrian prophecy, so lets take a look at what he has said about them.
Baha'u'llah has claimed form the Old Testament to be the "Lord of Hosts";
"Say: O concourse of the rulers and of the learned and the wise! The Promised Day is come and
the Lord of Hosts hath appeared" 2
Since it is not disputed that Baha'u'llah claimed to be the return of Christ I'll not tire the reader further on this point.
Baha'u'llah claimed his fore-runner the Bab to be both the Mihdi (since this is not disputed I'll not tire the reader with quotes regarding this) and the return of John;
"O followers of the Son!
We have once again sent John unto you, and He, verily, hath cried out in the wilderness of the Bayán: O peoples of the world! Cleanse your eyes!" 3
Baha'u'llah claimed to be the one who fulfillled the verse in the Quran;
'And in the mighty Qur’án: “What can such expect but that
God should come down to them overshadowed with clouds?”' 4
Baha'u'llah claimed to be the Shah Bahram promised to the Zoroastrians;
'The fourth question: “Our Books have announced that Sháh Bahrám will come, invested with manifold signs, to guide the people aright….”
O friend! Whatsoever hath been announced in the Books hath been revealed and made clear.' 5
Then there is what Abdul Baha said;
"Abraham, Moses, Zoroaster, Buddha, Jesus, Muḥammad, the Báb and Bahá’u’lláh are one in spirit and reality." 6
And Shoghi Effendi put his word in;
"To Israel He was neither more nor less than the incarnation of the “Everlasting Father,” the “Lord of Hosts” come down “with ten thousands of saints”; to Christendom Christ returned “in the glory of the Father,” to Shí’ah Islám the return of the Imám Ḥusayn; to Sunní Islám the descent of the “Spirit of God” (Jesus Christ); to the Zoroastrians the promised Sháh-Bahrám; to the Hindus the reincarnation of Krishna; to the Buddhists the fifth Buddha." 7
'He alone is meant by the prophecy attributed to Gautama Buddha Himself, that “a Buddha named Maitreye, the Buddha of universal fellowship” should, in the fullness of time, arise and reveal “His boundless glory.” To Him the Bhagavad-Gita of the Hindus had referred as the “Most Great Spirit,” the “Tenth Avatar,” the “Immaculate Manifestation of Krishna.”' 8
1
Bahá'í Reference Library - Proclamation of Bahá’u’lláh, Pages 27-30
2
Bahá'í Reference Library - Tablets of Bahá’u’lláh Revealed After the Kitáb-i-Aqdas, Pages 238-240
3
Bahá'í Reference Library - The Summons of the Lord of Hosts, Pages 54-67
4
Bahá'í Reference Library - Epistle to the Son of the Wolf, Pages 101-120
5
Bahá'í Reference Library - The Tabernacle of Unity, Pages 57-65
6
Bahá'í Reference Library - The Promulgation of Universal Peace, Pages 197-203
7
Bahá'í Reference Library - God Passes By, Pages 89-103
8
Bahá'í Reference Library - God Passes By, Pages 89-103