The new owner will likely have a representative approach you in the near future to negotiate a Cash for Keys Agreement. You have many rights as a tenant in DC. The bank knows this and will likely make you an offer to vacate the property within a certain time period. The amount and time period are negotiable and you don't have to agree to it at all. That said, sometimes the offers can be pretty attractive and make it worthwhile to move.
Let me know if you have any other questions or need any advice on the Cash for Keys process.