4. Not great: WWE can't get over betting on old horses
Well, this is from the perspective of general WWE fans. The promotion has a very bad habit of banking on old stars and gives less importance to building new ones. A lot of wrestling journalists have blamed the TV rating crisis on WWE's inability to come up with the new Stone Colds and The Rocks. Sporadic, but disturbing, the appearance of part-timers (read Goldberg, Brock Lesnar, and The Undertaker) around important PPVs has been detrimental on many levels. However, hiring superstars that do not have much gas left in the tank and using them in feuds with already established stars, instead of putting over the younger talent, has also hampered the development of newer superstars.
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Bringing back Rey Mysterio was an excellent opportunity to elevate an upcoming star (like Ricochet, or Humberto Carillo) but WWE is rather satisfied in using him against proven stars like Brock Lesnar and AJ Styles. The company can go this way with Morrison as well, which might get a temporary boost, but will not go down well in the long run.