Putting subway cars on the RT route to Scar Town Centre would save the ridiculous tunnel through bedrock and the Kennedy Station Rebuild, plus keep the seven stops and stations. Widen the northbound tracks a bit and you are done at Kennedy Station.
Nearly the same route, but with the exact same subway cars, same destination, about $3B cheaper. Duh! Another no-brainer! Scarberians still get their subway, but for $3B less!!!!!!!!!!!!!!!!!!!!!!!!!!!!