As it currently stands, I highly doubt the Undertaker's streak will come to an end. If it did, Undertaker would have to be in agreement, as many fans are not aware just how much backstage stroke the Phenom really has. He's on the same level as Triple H, but obviously he has never abused it by burying upcoming talent.
If you haven't already read, The Wrestling Cafe discusses the latest on ending Undertaker's WrestleMania streak ending.
In a way, if a wrestler were to end the Undertaker's undefeated WrestleMania streak, it might actually do permanent irreversible damage to the wrestler's character, and he will most likely be unable to recover from it.
Many are not aware of how seriously the majority of wrestling fans now take Undertaker's streak, and his 80 percent typical crowd support grows to absolute 100 percent on WrestleMania nights.
However, if WWE were to creatively put the proper effort into building a wrestler, and having the excellent precise build up prior to the match at WrestleMania, it could work. It all depends on execution. With all the right factors, a mega star could be born, or it could result in one of the worst nights in pro wrestling history.
The best route to go would be to simply use the already prestigious value that Undertaker's streak has; have a wrestler challenge it, and come extremely close to ending it.
Generally, as long as Triple H does not challenge the Undertaker again this year, everything should be fine.