A former employee of Meizu (now with Blue Charm) @Huang Yi Xuan quickly dismissed the idea of Exynos 8895 on Pro 7 Plus and called it a big rumor. He said that Meizu Pro 7 Plus can never sport the Exynos 8895 processor. He added that even before he separated from Meizu, it has never seen the Exynos 8895 chip as an option.
In addition, a supposed Samsung employee @Blue Blue V said that Exynos 8895 has no third party samples thus it can’t be found on the Meizu flagship smartphone. It can be seen that the Meizu Pro 7 used the MediaTek X30 chip and it is almost certain that the Pro 7 Plus will do just the same. It has also been said that Meizu Pro 7 is coming so late because of production scheduling of the MediaTek X30 chip. The Pro 7 will be unveiled on the 26th of July as earlier speculated while the Pro 7 Plus will certainly come later in the future but not with Samsung Exynos 8895 chip.
Source (Translated from Chinese)