"G-Central does not name the source of this leak." Oh c'mon, please don't be silly. You can just simply take a look at the user manual, which is publicly available on the Casio website: casio.com/content/dam/casio/global/support/manuals/watches/pdf/35/3575/qw3575_EN.pdf casio.com/content/dam/casio/global/support/manuals/watches/pdf/35/3578/qw3578_EN.pdf
A recent leak appears to have revealed more details about the upcoming Casio G-Shock GW-BX5600 and GMW-BZ5000 watches. The report suggests that these new models could support faster solar charging from higher battery levels. It also indicates that they might offer more world time zone options and a particularly precise stopwatch.