Based on some of Rick Eid’s comments about how P.D. will handle its original plan for the deadly Season 7 finale, I suspect that early Season 8 could play out much like late Season 7 was intended.
She will be back on Chicago P.D.; it’s just a question of how much it makes sense for Upton to be different in Season 8.
All of this said, at least fans don’t have to spend what could be a very long hiatus wondering if Tracy Spiridakos will return to Chicago P.D. or stick around FBI for the long run.