There are very, very few fights that would be dream fights as the sport is still so new that fighters that are considered elite or champions can quickly become average (e.g. Gonzaga, Forrest, etc.). I would have loved to see a prime, motivated Fedor against the current crop of HWs to show the Zuffa retards how amazing Fedor was before age and injuries caught up with him or certain "what if" scenarios that would have changed the MMA landscape (e.g. what if Rampage or Vitor had the mental accumen to match their physical gifts?), but an Ali/Tyson type of "dream fight" has yet to really materialize in MMA. In another 10-20 years, we'll most likely be comparing the champs to GSP or Anderson and then MMA will have matchups comparable to boxing.