#1 The retirement stipulation was only meant to build this rivalry up

The most logical answer, in this list, is that Triple H put his career on the line only to build his rivalry with Batista. Since attacking Ric Flair, The Animal didn't do a lot to promote this rivalry. However, since adding the retirement stipulation, The Game did a great job.
Now everyone is talking about this rivalry which is what was needed in this rivalry. I feel that this stipulation was only added for the build-up and Vince has no intentions letting Triple H retire this soon. He has already fought in matches where his career was on the line but didn't lose them. And this could be the case in this year's WrestleMania as well.
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