I just planted new grass seeds. 3 weeks after putting down Crabgrass preventer. I'll let you know how it comes out.
I did added a little top soil to the area so not sure if that's cheating. But maybe that's the trick.. Give the new seedlings some new soil to grow in rather than the soil which just got fertilized with pre emerger.
I also threw some new seeds down in the grassy areas too hoping to keep the full look