At the end of Destiny, after you've become a super powerful guardian capable of wielding dramatic amounts of Light, you will need to sacrifice yourself to afford Rasputin the Light required to repel the darkness. In Destiny 2, you will create a new character, post-Destiny 1, and you will be able to find relics (armor, weapons) used by your precious character(s). Or perhaps Destiny 2 will be a prequel, and you actively and unknowingly doing that now. Perhaps that's why what you are doing now is your... destiny.