Justice Kane has said she will release her decision on the OIC challenge lawsuit (CCFR et al vs Canada) by the end of October. This could kill the OIC, but the Liberals likely have a replacement OIC ready to go.
If they don't have a new OIC, Bill C-21, which is now with the Senate, has provisions to ban all the same firearms and many, many more on a 'go forward' basis through the "Firearms Advisory Committee" which will be stacked in the Liberal's favour. So, the court challenge, if favourable to the gun community, means nothing in the big scheme of things. Bill C-21 will pass. Trudeau's pseudo majority has the votes to do it.