Sounds like a plan to me. If you are really lucky, she may consider herself a blessed auntie and coo over the young ones...but that is unlikely unless she becomes broody...or lonely enough to be excited to hover over the little ones.
If she clucks at them with a little chook, chook, chook when she finds food, she is calling them like a momma hen to her chicks which would indicate that she may be happy to mingle with them...but obviously more commonly the larger, oldest bird declares herself queen and insists all others remain out of her way.
Good luck with your new little brood. I'm so sorry that you lost the majority of your first flock. Hopefully that has been solved now.
Lofmc