The Japanese technology group said the reveal will come this week, with leaks pointing to a flagship Xperia 1 VIII handset.
Rumoured changes include four colours, a redesigned triple-camera layout, a 6.5-inch display, Qualcomm processor, strong battery life and retained headphone jack.
The launch would mark a fresh Xperia overhaul and add competition in Android smartphones, where Samsung remains the dominant brand.
Is the new Xperia a genuine challenge to Samsung or a final gamble on a niche hardware strategy?
Why has Sony's camera dominance failed to make its own Xperia phones market leaders?
As regulators weaken Google's grip, can Sony's flagship finally exploit the cracks in the Android ecosystem?