Well you see the original storyline got scrapped (it was much longer) as well as vanguard, crucible and 3 factions originally 5 all had a story line but that was cut, that's why they say odd things sometimes. Oh and the original story supposedly had to do with that the traveler was actually evil and so was the speaker. I highly doubt that we'll ever find out what that was about. Now could they change and make an amazing story in destiny 2? Absolutely if they apply themselves and don't half ass it. Honestly if destiny wants this alleged 10 year plan to not fail and be successful they need to make a lot of changes and straighten up.