My Samsung S7 Edge is completely dead, i'm getting a replacement phone, but will I be able to get all the content off the old dead phone and put on new phone?
Not if you can't get it to turn on at all (and the data wasn't on an SD card or synced to a google account) then you would not be able to get it off the phone.
Not if you can't get it to turn on at all (and the data wasn't on an SD card or synced to a google account) then you would not be able to get it off the phone.