What will happen with the Undertaker vs. Triple H feud?

As we saw last RAW Triple H seemed to reject the direct challenge Undertaker but it is reported that this is only to extend the feud and the fight is planned for Wrestlemania 28, Shawn Michaels is expected to be involved in the feud and to convensa Triple H to face Taker at Wrestlemania face to face and possibly Shan Michaels is the special referee for something they have to put different as this will be the third time that Triple H will face Taker at Wrestlemania.