Are there any references to prominent Maharashtrian saints like Gajanan Maharaj in the introduction to this book?

No, the introduction as presented in the excerpts from Chapter 0 does not contain any references to other prominent Maharashtrian saints such as Gajanan Maharaj. The focus is exclusively on the backstory of Sai Baba. It details his mysterious appearance, his habit of saying 'Allah bhala karega' (God will do good), his journey from Dhupkhede to Shirdi with Chandbhai's family's wedding party, and the specific moment he was given his name by Mhalasapati. The narrative is tightly focused on establishing the origins of Sai Baba's presence and name in Shirdi, without mentioning any contemporaries.