#3 The brutality leads to a No-Contest
As stated previously, the 'No Holds Barred' stipulation means that a lot of violence should be expected in the match, albeit violence within the current WWE parameters.
It might have some blood, but numerous power bombs to Triple H or sledgehammer shots to Batista might leave either man or both men simply unable to continue.
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They are both in their late 40s and will likely have to rely on big spots with maximum punishment guaranteed.
If they both go through some tables or Batista spears The Game into the steps or something that incapacitates both men during the match, it might put them in a spot where neither man is able to continue.
That could ensure another match between the two if this happens and it would at least mean that Batista didn't officially win, so Triple H's career is still safe.
Depending on how long Batista is sticking around in this run, a No-Contest might be unsatisfying to fans rooting for either man, but it is a possible outcome if the feud is to go past WrestleMania.