Answer:
The concept of WWE Hell in a Cell matches was introduced by the WWE in 1997, specifically at the Badd Blood: In Your House pay-per-view event. The first Hell in a Cell match took place between The Undertaker and Shawn Michaels. This match was significant because it introduced the Hell in a Cell structure as a unique and brutal match type.
The Undertaker's WrestleMania streak, on the other hand, refers to his undefeated streak at WrestleMania events, where he had a series of victories that spanned over multiple years. The streak started at WrestleMania VII in 1991 and continued until WrestleMania XXX in 2014 when The Undertaker was defeated by Brock Lesnar.
Therefore, the statement that a Hell in a Cell match wouldn't have occurred until WrestleMania 1999 is incorrect. Hell in a Cell matches were already taking place before that time. The Undertaker's WrestleMania streak and the existence of Hell in a Cell matches are separate aspects of WWE history and do not impact each other directly.
Explanation:
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