They'll probably do a hybrid of sorts.I've been told that a hybrid option for the North Williamstown crossing was ruled out due to how close the road junctions were, which meant that if it were done hybrid they would close off the local roads which the LXRA found was an unacceptable outcome.
Someone I know was told by the LXRA that due to lack of room of diverting the rail line, that it would require a full shutdown of the rail line. It will involve a new station, the roundabout replaced with traffic lights and a few km of trench with provision of high density residential, where the current high density currently is.
There is nothing announced officially or on the website. He showed me the plans, but not sure whether I could trust him or the internet. Normally the internet can turn out to have some biased stuff, but I really not sure whether my friend would make this elaborate plan to make myself look like a fool on the internet by posting this.