Hell no! He shuold be just the way he is now!
There´s been too many changes lately: 5 title changes at Extreme Rules, Rey Mysterio unmasked, 2 top superstars fired, John Morrison turning face, CM Punk may turn heel, Ric Flair returns from retirement, Triple H returns, PG and new tv show WWE Superstars.
So I don´t think that WWE will ever change The Undertaker to the American Bad@$§.
But I´m not saying The American Bad@$§ s¤cked. I loved it!
But I really hope that he still have 3 years or more.