I cant say for sure but im sure they would have to, cos so many people would be angry if they left it out. Also people who havent read the libri would need to know what happens, especially cos its the end.
Most likely, since they're trying to make the last two Film (Deathly Hallows is going to be diviso, spalato into two Film - for those who didn't know...) the best out of all of the other six.