I'm not saying this as a fact or even a roomer but what would you think if Queen were to join mix with another group, such as Queen + Led Zeppelin, Queen + The Who, Queen + AC/DC, or Queen + etc.? What other band would make the perfect add-on to Queen? It doesn't matter about "having 2 guitarist or drummers in a band would be too much!" or "But Freddie HATED Rod Stewart! That would hurt his feelings if Rog & Brian toured with him! :((((" or anything like that (those were ONLY EXAMPLES). Just musically, not personally.
*I don't mean someone to replace Freddie, just a mash up.
I thought the Crazy Little Thing Called Love / Rehab mash-up was pretty good.
"Back in Black" and the drum beat to "When The Levee Breaks" goes with everything.