Again, these updates will only add-up the April 2018 Android Security Paches and there is nothing more to expect for but might also includes various bug fixes.
You may check out the following table below according to your device model number and or carrier providers. Noting that each variants will get an update in phases, so be patient as you will get your update sooner.
United States Carriers Including the Factory unlocked variant:
Carrier | Galaxy S7 | Galaxy S7 Edge |
AT&T | G930AUCS4BRD1 | G935AUCS4BRD1 |
T-Mobile | G930TUVU4CRF1 | G935TUVU4CRF1 |
Sprint | G930PVPU4BQD2 | G935PVPU4BQD2 |
Verizon | G930VVRS4BRC3 | G935VVRS4BRC3 |
US Unlocked | G935UUEU4BRD1 | G935UUEU4BRD1 |
Other variants such us the Galaxy S7 G930W8 and Galaxy S7edge G935W8 from all of the Canadian carriers, and the international version the S7 G930F and and S7 edge G935F hasn't responded yet. These fellas might skip the security patch for this month and will jump up straight to Android 8.0 Oreo this coming June.
That's it for now, will just keep you updated these coming months.