It could be a law that says "king street shall remain open to all vehicles during all hours with not straight through restrictions, largely as existing in 2016" or something like that.
True. That'll save King, but not Queen (pilot starts within weeks of King legislation passing).
Make specific orders on all existing tracks (King, Queen, Dundas, College) and Adelaide/Front/Fort York Blvd becomes the new target. Cost of running basic track on an otherwise unmodified street would only be around $100M to the city (fed transit slush fund will cover the rest). Of course, that's not going to be a pilot; this will be permanent.
He could order all roadway changes south of Bloor need to go through the province, and he'll find himself needing to assign a Minister to manage run of the mill planning department changes for downtown development applications. Developers will make noise if their applications or permits get delayed by this kind of thing.
It also pretty much ensures Doug will spend some of the 2022 (and perhaps 2026) election defending his decision to micromanage city planning; then when he loses the city will follow through, likely in a much grander way, after the restriction is lifted by the next non-OCP government.
The only way to politically favourable way to kill King is the same way the province killed the York U BRT. Let it happen, and demand it get reversed after DRL east+west is done BUT unless the DRL is actually finished while Ford is still in office even that requirement probably wouldn't be enforced as nobody else will care.
He needs to talk Tory into killing it for him and that seems unlikely given Tory's very strong lead in the municipal election.
I expect King to happen as planned. Heck, giving Tory some "strong mayor" capabiltiies is actually a bit of an endorsement of the Tory King plan as it takes authority away from those like Mammoliti who oppose it.