This. While Feige might be a near-unique prodigy for this kind of thing, Marvel Studios also benefited from its structural design: an independent studio created from the ground up to do one thing, and then incorporated as a semi-independent studio under Disney to. . . still do that one thing.
Whereas Warner Brothers, is not that, and I don't think anybody could actually create a "DC Studios" analog inside WB, no matter how talented. It would just step on too many toes and go against too many structural obstacles. After all, to build a "DC Studios" would mean assembling people and money and materials and IP under one new organizational roof, and that would mean taking all those things away from their current bosses.
A DC Studios I would love it especially under the WB umbrella