5. A tribute to the animals of WWF/E
It may not be a feature of modern day wrestling anymore, and largely for good reasons, but the animal kingdom used to provide fans of the industry many reasons to love their favourite superstars. Whether it was Matilda the bulldog accompanying Davey Boy and Dynamite Kid to the ring, or Damion, Jake Robert's phyton, having a creature on their side made certain wrestlers stand out above the rest.
In a WWE museum, fans would really appreciate some kind of tribute to the animals associated with the 80s and 90s wrestling. Perhaps the collar worn by Matilda, or the perch that Koko B Ware used to use to carry his parrot to the ring could all be on display.
Of course, these could also be accompanied by pictures and captions talking about famous incidences when the animals influenced matches i.e. when Matilda chased Bobby Heenan around or when Damion bit into Randy Savage's arm.