One movie doesn't effect any other movie that I may watch or my overall movie experience, or future movie watching experiences, however, and expansion in this game completely effects any future gaming in this game.
Yes this feels like a huge lack of information, ESPECIALLY when they want you to preorder it now before the 7th. Half of this is just vague crap. You noted the: Stay tuned for more information coming soon - Over the next few months we will reveal more exciting new features! However, this is one crappy sales pitch. Buy this and we will tell you LATER what you are paying for.
You wouldn't preorder a car if they said: It's cool and it goes fast. More details after you spent your money, which is non-refundable. (Doors MAYBE included, right?)