Not long ago, we heard that Samsung could launch a 5.2-inch S7, as well as a 5.8-inch variant. Now, SamMobile is reportedly "confirming" that the Galaxy S7 will indeed have two versions, though it's not clear if their screens will differ in size. What SamMobile notes is that the two S7 variants (model numbers SM-G930 and the SM-G935) will resemble the Galaxy S6 and Galaxy S6 edge in one regard: the SM-G930 will have a regular screen, while the SM-G935 should sport a dual-curve one.
It's said that, internally, Samsung is referring to the SM-G930 as the "Hero", while the SM-G935 is being called "Hero2". The entire Galaxy S7 project is known internally as Project Lucky. Depending on market, the two S7 smartphones should be powered by either Samsung's Exynos 8890 processor, or Qualcomm's Snapdragon 820.
According to SamMobile, the two Galaxy S7 handsets will be available in the US, Canada, Europe, China, and South Korea (though this doesn't mean we won't see them in other markets, too). All relevant US carriers are expected to offer the new Galaxies.
Of course, for now we can't be sure of anything regarding Samsung's next-gen Galaxy flagship series.