Since the Destiny 2 open beta for PC, some players have data mined a lot of information from the code and that revealed a lot of information..
I hope there aren't just five strikes, but it would not surprise me since they are releasing the first raid after a week from launch.
They also leaked the first expansion is about Osiris and the second expansion about Rasputin. Just a couple of days left till the release, I know what I'm doing on Tuesday midnight!