Superman stronger than Black Adam in Rebirth (JLA #59)

[DCfan10]

I read JLA #59 today and noticed that Superman seemed considerably more powerful than Black Adam, given how he easily knocked away Brutus who had just given Black Adam trouble.

I haven't read much rebirth, but has Adam been made weaker or something? This is a far cry from post crisis when they seemed relatively at the same level.

Even if you think Superman should be stronger, surely the difference shouldn't be by this much?

What makes this more confusing is that the cover of the upcoming issue suggests a fight, which going by the logic of the previous issue should be easily in Superman's favour.