I've recently been re-reading the Young Avengers with the launch of the Young Avengers Presents mini-series, and in the introductory story arc I was just struck full in the face by irony. In the Sidekicks story arc, Kang the Conqueror is attempting to recover Iron Lad, who is his younger self. He's arguing that Iron Lad must return to his own time so that he can grow into Kang or the damage to time will be disastrous.
Yet in the Avengers Forever maxi-series, Kang himself was willing to risk the universe itself to himself avoid becoming Immortus, the lord of Limbo.
Kang, a despot whose hypocrisy is greater than Time itself. That's irony.