Opinions from the Commander Format Panel varied. Some believe Commander is more fun without them, others would like more time to see how the Commander Bracket system is adopted before doing anything here, and others felt it’s too soon to do anything with these cards. There were a few people who were open to doing something with Jeweled Lotus now, but that was not the majority opinion. The overwhelming majority of the panel did not want to do anything with any of these cards at this time.
I will be transparent and say that I believe if any of these are ever to return, the most likely one is Jeweled Lotus due to its one-shot nature, iconic feel, and ability to help support high-mana value commanders. I want to be clear, this is not me saying that will ever happen, but that was the one among the panel with the most traction.