Death Wish 6
The producers of this film planned to film a 6th entry into the series but for whatever reason decided against it.I think one of the reasons was that Bronson himself decided that enough was enough and wanted to leave the Paul Kersey character well enough alone.That is why the last line in DW5 was from Kersey along the lines of "if you need my help call me"
There were also plans to introduce a new character to continue the franchise in DW6 as Kerseys successor and thank God that never happened.
If a remake is ever planned i just hope that they include enough plot threads to continue the series better instead of retreading the same plot.