Yes, he wanted a Superman tease but didn't seem to really run it by anyone. As a result, we lost us the One True Witcher.
You can say that Rock tried to inject something into the DCU, but I'm hard pressed to see what. His Black Adam was the Rock's typical anti-hero, only with less acting on his part (which is almost impressive).
There was no jolt, just Dwayne's standard fair. He had to be the center of attention, but dare not offend.
If anything, he pushing the slipping universe closer to the edge.