This is the current status...
from wikipedia (because I am too lazy to type/paraphrase anything)...https://en.wikipedia.org/wiki/America_the_Beautiful_quarters
"According to the legislation, once the America the Beautiful Quarters Program ends in 2021, the obverse of the quarter will revert to the original Flanagan design used from 1932 until the start of the 50 State Quarter Program. However, the reverse will be redesigned to feature General Washington crossing the Delaware River, the same theme that was used on the 1999 New Jersey quarter."
H.R. 6184 (110th): America’s Beautiful National Parks Quarter Dollar Coin Act of 2008 (link to pdf)