Yes, but...
If one of the parks is open late (especially if it's the MK or DHS), then get from the Poly to that park (monorail or boat to the MK, bus to DHS) and from there to BWV (bus from the MK, walk/boat from DHS). Epcot also would work, but that would involved lots of walking (from the Poly to the TTC, then through Epcot to exit at the IG) and would require that you have a park ticket to go through Epcot.
There will be bus service at least from the Poly to DTD still running until quite late and you can catch a bus to BWV there. This can take quite a while, however.
If both the MK and DHS are closed, therefore, I would suggest just taking a cab.