The Game Informer article confirms that you will see the motion comic even if you import, in which case it will recap what happened. Apparently it'll prompt you if there is a decision that you don't have in your saves, so those without DLC will be brought up to speed on Arrival and Overlord, at least. Conjecture, but it might allow people to import unfinished saves as well (knowing how common that stuff is), and allow them to fill in the blanks? I think DA2 had something like that, where the game autocompleted your playthrough by grabbing some default decisions based on what you'd done so far in your save.