For Baha'is the prophecies concerning the second coming of Christ were fulfilled in 1844 in Shiraz with the declaration of the Bab (Siyyid Ali Muhammad) that He was the Mahdi and Qa'im ... this tied in the Islamic and Christian expectations... Muslims expecting the return of Jesus and Christians as well.
Two movements also sprang from this period around 1844...the Adventist movement from William Miller and the Shaykhi movement from Shaykh Ahmad Ahsai in Iran and Iraq.
I believe Bahaullah’s claim is not to prophethood or Messiah in the manner it is narrated in prophecy in the Judaic and Islamic traditions. I believe his claim is a novelty being the foretold manifestation of God. I believe the Bahai doctrine claims that the prophetic cycle (Dur-i-nabuwwat) from Adam to Muhammad is passed and now in the day of the Lord, Bahaullah is the great news (Naba-i-Azim) that will fill the earth with the glory of God.
So, it appears that this is not prophethood in the typical Judeo-Christian-Islamic sense. And certainly does not appear to be an idea conforming to the second coming of Christ which would be a Messiah and a prophet as expounded by Muhammad (pbuh) and the Islamic tradition. The Islamic sense of prophethood is strictly human as exhorted by Quran and Muhammad (pbuh).
Here it is also important to shed some light on the Shaykhi sect of Shia Islam from which Bahai faith emerged, this sect has had this ideology of divine-humans before the claims of Bab and Bahaullah. This is not an Islamic ideology and I believe the sect was treated heretical on this basis in the Islamic tradition.
Again, the Bahai argument of the age of the Glory of God be as it may, I don’t feel it can applied to the concept of the Second Coming of Christ. The prophecies of Muhammad (pbuh) are heavily centered on the terminology of the Jesus, Son of Mary-- and his people falling into a parallel with events that overtook the Jews.
Do you have any references directly from Bahaullah's writings that he is a prophet in the historical context and specifically the Messiah termed to be the 2nd coming of Christ?