Vince McMahon is still going back and forth on plans for next year's Wrestlemania XXIX. I'm told Vince is still set on John Cena facing The Rock for the WWE Championship and doing The Undertaker vs. Brock Lesnar for "the streak."
As of today, Triple H doesn't have an opponent but the company is still interested in Batista who could return and face Hunter. Another odd man out is the current WWE Champion CM Punk who could do another match with Hunter should things with Batista not work out.
The plans are very preliminary and there won't be a year-long build for the main event like there was for The Rock vs. John Cena this year but things are still heavily in the works.