Sony is expected to launch new device on 27th May in Taiwan and 28th May in Hongkong. According to local media, the company will unveil a “new Xperia flagship product,” alongside the selfie-friendly Xperia C4 and the Xperia Z4 Tablet, also Z3 Plus is expected
Sony Mobile is also holding a press conference on 28th May in Honkong the invites says  “The new Xperia flagship product” with “Top shot, screen, sound, water, design all in one and new color could be Xperia Z4 global launch or Sony Xperia  Z3 plus
Sony is also hosting an event in India on 26th may as there is no news on which device will be launched. we have to wait till next week for an official announcement.