If Sports Tonight can’t return as a weekly program at the moment, perhaps they could integrate “ST” News into the regular News updates, playing after every second update or something similar, as @cmo mentioned so that the Sports Tonight brand can get some exposure outside weekends to further re-establish the brand as a Ten staple.
Also, I think it would provide a point of difference to the other Networks, as theirs are the generic Sports updates, whereas Sports Tonight is a fully Sports driven program, providing a more in-depth look into all Sports codes for the day. 