There should be games where you played as the antagonist, for example, games where you were an Elite from Halo, fighting humanity and destroying worlds.
Or maybe a game where you were Sasuke, from Naruto, and had to go through the epic fights he had against Orochimaru, 1-tail Naruto, Itachi, and even Danzou.
Or how about a game where you were Ganondorf and had immense power. The official Zelda timeline splits into an era where Ganon actually won against Link, so why not a game about that?
Megaman pulled this off neatly with the Zero games, so why aren't there more games like this nowadays?