Samsung is working on a 2016 iteration of the Galaxy On7, this much is pretty clear since we've seen the new phone being benchmarked not long ago, and parts for it have recently been imported into India for testing. It would make little sense for the Korean company to launch a successor to the original On7 from last year and not do the same for the On5. And as it turns out we may have already caught the On5 (2016) being imported into India for testing a few days ago. Now the same handset that we assume is this year's On5 (the SM-G570, that is) has been spotted in the Geekbench...
Source: http://www.gsmarena.com/upcoming_samsung_galaxy_on5_2016_seemingly_gets_benchmarked-news-19163.php