#3. Match ends in a disqualification
If Dolph Ziggler chooses a straight forward match at WWE Extreme Rules with an added twist, then it's easy to see the match ending via disqualification since Ziggler is known to have that side to him.
At the same time, there is nothing stopping Ziggler from choosing a match that allows the title to change hands on a disqualification.
Whilst this would then allow him to push Drew McIntyre to the limit, it would also allow him to call in Robert Roode. Remember, if Roode attacks Ziggler then it's a DQ in favor of The Showoff and he could then become WWE Champion.
This all depends on the chosen stipulation after all. If this was just a straight forward match for the WWE Championship that ended via DQ, then it would mean that these two men could square off again in the near future.
It could be an interesting match, but as already noted with the WWE Championship on the line, the stipualtion now needs to be one that the company has never done before.