Might Fail in WWE: Vince McMahon prefers 'homegrown' talent

One thing that has been a hallmark of the WWE is their tendency to push talent that was brought up primarily in their own system over those that found success elsewhere first.
You'll find examples of this all throughout the WWE's history. Men like Randy Orton often enjoy a protected status because they have only wrestled for the WWE throughout their entire career.
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Then there's Roman Reigns, who was picked to replace Chris Hero (Kassius Ohno) in the first inception of the Shield. Vince McMahon did so because the other Shield members, Dean Ambrose, and Seth Rollins, had both wrestled quite prominently for other promotions.
Rollins is even a former Ring of Honor world champion. Reigns has been only involved in the WWE's developmental program from the start. Now, which of those three men has received the greatest push in WWE?
Kenny Omega's past success might actually hold him back in WWE because of this attitude.