It seems unlikely. Elizabeth's principle objection to Darcy was that in detaching Jane and Bingley, he had been the "means of ruining, perhaps for ever, the hap

It seems unlikely. Elizabeth's principle objection to Darcy was that in detaching Jane and Bingley, he had been the "means of ruining, perhaps for ever, the happiness of a most beloved sister". Darcy's correcting this mistake is therefore absolutely essential to reconciling himself to Elizabeth. The Jane-Bingley arc is also the longest in the novel and of secondary importance only to the Elizabeth-Darcy arc. The novel could not really have had a happy ending without resolving it.