Because Death would not stop for me:

The Fortress of Solitude:

Superman had ensured Clark Kent took a 'vacation' for a week to a godforsaken part of the world outside major cell phone or other kind of contacts as he decided to investigate on his own as well as with the rest of the League the strange anomalies that followed. Hal, Guy, and Jon, and the other Lanterns reported a strange being akin to Mongul had stormed Almerac and slaughtered every last inhabitant, with a slave who resembled very much a figure of whom even mages spoke in whispers.

Death of the Endless, the second-eldest and in many ways the most dangerously powerful of the Seven who bound Existence. For the most powerful being in the universe, she was in dire straits. Thanos had made her display herself and clearly signaled her status as a slave. The prospect of a Mongul able to unleash blasts of awesomely destructive power from his eyes and fists commanding one of the most powerful fundamental forces in existence was a problem in itself.

What Superman did not expect or logically consider in the midst of the immediate was one of the other consequences of securing power over Life and Death and leaving them in a revolving door of chaotic incoherence.

A voice spoke to him in the soft and strong terms he'd heard so often in memory in his crystals.

My son, in pure Kryptonese, the high and refined dialect of the capital. My son, your mother and I never dreamed we might be able to see you as you are before us, alive and well and so very strong.

"Father?"

Armagetto:

Darkseid stared with some consternation at the set of warriors that manifested via boom tube in his capital.

Izaya.

Uxas.

Why are you here?

Whatever force has restored us to living in this world as we know it is easily beyond us, I do neither of us any insult to admit as such.

Darkseid nodded.

That much is true.

Izaya looked him in the eye and said:

We must postpone our own confrontation to deal with this force. Divided whatever commands that power can match us more easily than he can united.

Darkseid laughed, coldly.

Millennia of endlessly bitter war cast aside for a short-term alliance just like this?

Izaya shook his head.

No, surprise as our greatest ally, surprise and the knowledge that when whatever's disturbed so much else is cast aside, assuming our return remains we can resume the usual state of affairs.

Darkseid nodded.

Those terms are acceptable. So then shall it be.

He rubbed his chin with his finger.

Now........there is the practical matters of command of whatever force we bring and other factors related to that. Those won't be settled today. Expect my arrival tomorrow on your world, Izaya, and an embassy of the truce suiting one. The moment this is over.....

Izaya nodded.

We are too different and have been enemies for too long for any true peace to hold. You and I alike know that much.

Darkseid smiled, the only real hint of genuine peace with him and a nod of admission of the truth.

Warworld Orbits:

When Warworld came closer to the Earth, Thanos of Titan was surprised to see a few things that he did not expect. Among them was a set of forces clad in burning yellow led by an alien of a shade of purple somewhat more reddish than Thanos's own.

In blackest day, in brightest night, beware your fears made into light. May those who worship evil's might, burn like my power, Sinestro's might!

The Sinestro Corps had deployed in no small amount of strength before the Mad Titan's new base. Already content to build his new weapons from designs that were already present, the Titan eschewed Sinestro's attempts to contact him and waste his time and ordered firepower to be launched at them.

Death, clad in an outfit deliberately akin to that of the Mistress he'd once loved and served, stood beside him with a broken gaze. His hand was on her sigil, which burned with a blue fire and due to this the deathless void was deathless no longer. Powerful weapons designed to give a herald of Galactus at least something to make him notice them burned holes through the Sinestro Corps members, leaving corpses to freeze up in the void.

Thal Sinestro himself snarled and ordered his men to retreat. As much as it pained him, he would have to face Atrocitus and those wretched Guardians. And do so recognizing that it was indeed Warworld alone in the current deathless phase that could bring death.

Thanos enjoyed that Death was required to stand by his side nude, his massive hand cupping her ass, before ordering her to kneel before him as he rested his feet on her back, giving a set of orders. This was the second time these people with magic rings had challenged him. It would not be the last and he intended to meet the next one with a total war and to do so in a new fashion.

After his first set of orders were given, he pulled Death up by her hair, leading to a spray of iridiscent blood when he tore out part of her hair from the right side of her head.

Time for you to learn to fight, because if you don't, you'll threaten my anger. And you won't like me when I'm angry.

Death knelt, sighing.

"Yes master, your will be done."