Darkseid with the IG vs Averngers/JLA

Let's say the Grandmaster had made a mistake and the Infinity Gauntlet, which Darkseid got hold of, actually worked in the DCU, how would it have ended?

Darkseid vs JLA/Avengers involved in that crossover

Darkseid vs Grandmaster & Krona

If IG worked in DCU, he would murder the JLA and Avengers no questions asked.

We would defeat the other 2 as well.

Krona is more powerful than Galactus but nowhere close to IG.

Sucks that it never worked in the DC uni.