“<oldname> is DEAD! I am <newname>!!”-character that turned evil
When one character turns bad and has a showdown with the protagonist there’s a good chance that this will be said. The most recent example I can think of off the top of my head is Smoke saying it in MKX. There were a number of good characters turned evil in the storyline but I think he was the only one who had a new name. Guess he didn’t think Dark Smoke was a cool enough name, even though it’s as good as any shadow/dark(insert name here). Can you imagine if each turned character had their own alternate names? The frustration of a hero character warning a former ally against fighting only to have them say “Whoa, whoa, whoa, get with it and use my new name, loser.” Then once a bad character is defeated the process has to be repeated for each one while trying to keep their names straight.