Positive: establishing new talent.

Whether WWE wants to admit it or not, there will come a time in the future when WWE is forced to hand The Shield their first big loss in a long time and it's going to be a big deal. Its also going to be a chance for WWE to finally put over a talent besides Roman Reigns, which will hopefully ricochet them into the title picture or the main event storyline.
For example, let's say that Drew McIntyre is somehow able to beat Reigns for the title down the line. Not only would it be the best way to establish McIntyre as WWE's next big thing, it also takes some of the heat off of Roman Reigns for finally losing the title to an up and coming star after a lengthy title run.
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Another thing WWE could do is have The Shield loss in a six-man tag match, which would go a long way in helping get a young babyface or heel over and maybe even set them up for a title run in the future. In the end, these are all possibilities that WWE is going to have to face sooner or later it could have a big impact on the future if the company isn't careful.
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