The braille in the teaser also reads: "Survive."
So obviously, we're left with a lot of questions for Season 2 (WARNING: SPOILERS AHEAD):
1. Was the story The OA told actually true?
When Alfonso breaks into Prairie's parents' house and searches her room, he finds books that could have inspired her fantastical tale (eg. Homer's The Illiad). When he shows the others, they are left in doubt as to whether The OA was telling the truth. It's worth mentioning, however, that the FBI agent Elias was also in the house, and he could have planted the books. If the story was false, we have no explanation for how she got her sight back.
2. Is The OA alive?
She's come back from the dead before, and it's quite possible that now she's in limbo between the living world and the dead again. The question is, will she return to the world this time?
3. Will Homer and The OA reunite?
The fact that she says 'Homer?' at the end of the series and that this same moment is repeated in the teaser suggests that they will reunite. During captivity they fell in love, but never once touched. Hopefully they will get their closure in Part II.
Though we don't know when Season 2 is coming just yet, it's likely to be around December this year (a year since Season 1 was released).