Now it seems the Xperia Z5 will be the last in the Z series as multiple sources have seemingly confirmed the news.
Jun Makino, Senior Product Marketing Manager at Sony Mobile, told uSwitch: "I can't comment on the future, but we will not be releasing a Z6."
He also said that Sony is "turning to the next stage, with the Xperia X series”.
Elsewhere, Sony Mobile Germany has seemingly confirmed that there are no plans to release an Xperia Z6.
In response to a fan enquiry on Facebook, the company said "the Xperia X series is under a completely new concept and will replace the Z series".
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The X Performance handset will therefore likely be Sony's flagship handset for 2016, although it looks as though it will only be released in Asia, and possibly the US.
Still, the Xperia X is almost identical to the Performance, although it runs on on a Snapdragon 650 processor as opposed to the Snapdragon 820 which can be found in the Performance.
Are you sad to see the Z series go? Let us know in the comments.