There might be a need for 24/7 sports in Sydney. Technically such a station, focused on Sydney (rather than a network offering) is yet to be tried.
Could be argued you could shrink the MSR brand to just being 954 in Sydney and elsewhere being a brand like Nine’s Wide World of Sport - a production brand supplying program to 4BC Brisbane and live sports to 1278 in Melbourne (but within a music format). Or maybe even scrap sports brand duplication altogether and call it Wide World of Sport (WWOS) Radio, given that is a heritage brand with strong football and cricket associations and given Nine are soon to own it anyway (and for that reason, I doubt I’m the first to consider this).
As has been said, SEN has sport covered in Melbourne. So unless Nine have ambitions to take that over (and please don’t be surprised if that’s eventually what happens, given media consolidation is a firm trend), just flick the network and build a strong NRL heavy sports channel in Sydney.
4BC rather than 882 can provide network support to such a station. Any squeeze that causes to 2GB’s lifestyle programs being networked weekends is easily solved by shifting those to 882 (4BH), the knock-on effect of removing sport from 882 is the leverage created to skew that station female (like Smooth). The Brisbane operation is probably optimised with a talk/music combo and same is probably the case in Melbourne. The obvious risk of Sydney going music as well as the possibility of too much 60s and 70s music overlap between 2CH and a musical 2UE (resulting again in small/splintered audience shares)