"An article I read (in a Detroit newspaper?) said that the Michigan legislature enacted a law in the recent past mandating that Michigan's votes in the EC will be cast by the winning candidate's slate of electors."
Notice the language says they would abide by the "certified" results (emphasis mine):
This is where things could get weird. The BSC is made up of two Republicans and two Democrats, all of whom are appointed by the governor. The BSC could deadlock 2-2 and not certify the canvass of votes from the counties.
Should this stalemate come to be, what then? The Michigan Court of Appeals could compel the BSC to certify the election results and Biden's win, but technically the deadline for them to do so doesn't neatly coincide with the meeting of the electors. The statutory deadline for BSC to declare a winner if 40 days after the election. That's five days after the federal "Safe Harbor Deadline" of Dec. 8 (the date under federal law by which a slate of electors named by a state enjoys presumption of validity by Congress, assuming all disputes have been resolved under state law in place on day of election).
A BSC impasse could mean the Legislature, with Republicans in firm control, might fall under enormous political pressure from national and state Republicans to ignore the will of the people and substitute their own partisan judgment by choosing Trump's slate of electors instead of Biden's (The Michigan Senate did pass a non-binding resolution stating they would abide only by the "certified" popular election results).
The U.S. Constitution invests the power to determine the procedures by which Michigan's electoral votes are awarded. That power was delegated to the BSC and the governor long ago. However, absent a certification by the BSC, the House and Senate could act on their own and choose their favored slate of electors. While the outcome of such action could be litigated in the courts, it would not prevent the action from occurring.
Gov. Whitmer could also act under current statute and both the Legislature and the Executive branch could transmit competing slates of Michigan's electors to Congress.
The courts and Congress would then be left to sort out the mess.
The harm this would do to the principles of democracy are immense, but it might happen nonetheless. Consider how many times during the past four years we've witnessed things that previously seemed far-fetched come to pass.
We need to tell House Speaker Lee Chatfield, Senate Majority Leader Mike Shirkey, and other Republicans in Lansing to stop playing partisan games, stop the fake investigation, and stand up for democracy.
Joe Biden won Michigan. Donald Trump lost. Finalize that result and move on.
In light of these potential developments, it makes Trump's earlier targeting of Governor Whitmer and his rush appointment of Amy Coney Barrett, claiming the SC would give him the election, seem like a long term, very calculated strategy. I believe Trump still thinks he will be president when all is said and done. And as if we needed any more proof, all of this is just another reason to get rid of the electoral college.