This was revealed during an interview with Imaging Resource where Sony exec Kenji Tanaka was quoted as saying, “Yeah, I think you’re right, and we have the opportunity to develop a type of enthusiast APS-C model, and the enthusiasts, especially the US ones are waiting for this type of model. But you know, last year, all the owners, especially at the US market, we conducted a market experiment, and for Alpha 7 Mark II, we kept the price at US$999. And I want you to know that the result was more than our expectation.”
He also adds, “Well, but we’re implying many things. Of course we are trying to expand the APS-C series of cameras. That maybe implies not only one product. And we implied we are working on the sports area, that implied not only a 400mm f/2.8 lens is coming. So we are implying many things, but not directly saying “next model is this one, the next model is this one”. But we’re focusing on sports and we’re focusing on the APS-C area.”
It is unclear which camera this could be, but Sony definitely needs to step their game up. Other companies such as Canon and Nikon have since launched new full-frame mirrorless cameras of their own, challenging Sony’s previous position.