I don't think Jon Jones would have accepted the fight regardless of wether or not it was for the title. The title is a symbol for the best in your weight division. It doesn't make you the best, JUST a symbol. Had Chael faught Jones in a non title fight and won, we know that the new best would have been Sonnen and the symbol wouldnt have clouded the truth.
I bet Jones wishes he had taken the fight now. Stepping up would have gained him a few fans and it would have been a pretty damn easy fight for him. Putting the guy talking shit to him in his place, saving the 151 card, getting another title defence. Everything would have been great for him had he taken the fight. He'd have no doubt gained a few fans and would have been considered a "true champion". For someone that considers himself to be a businessman...damn he's a shit businessman.