I would expect, win or lose this year state Democrats try to push someone like Elaine Luria or Abigail Spanberger into the race.
I also think Virgina is a better pickup opportunity for Republicans than New Jersey is, if only because Biden will win Virginia by less than he will New Jersey (I give him roughy 8-11 points in Virginia, as opposed to 13-15 points in New Jersey).
That said, unless Herring (I can't imagine African Americans in this day and age voting for someone for who admitted to wearing blackface) or Fairfax (Democrats both statewide and nationally would abandon him fairly quickly if he won the nomination) were the nominee, Democrats should still win.
I wouldn’t be so sure about that with Herring in particular. He had deep relationships with African American leaders and voters in the state, and his admission came first to the black caucus in the VA legislature. I don’t think he will (or should) be the nominee, but I wouldn’t count him out tbh.