This answer is nearly identical to the post I made on Takers next Wrestlemaina opponent and I feel the same answer works for this question also...
I have decided the best last match is a Wrestlemania 28 match for The Undertaker is The Miz... That match is also the perfect way to elevate Miz to the moon and make him the bonofide future of the company they are trying to do...
The Miz talks about ending the streak and does some crazy stuff which eventually gets him his match with Taker.... Mind you Miz is a full blown heel for the next year like he is now, however it is obvious the wrestling public is already dying for him to go face
They wrestle a good 30 minute match where Miz actually ends the streak... After the Miz wins he is so impressed with how hard it was to beat the Deadman he actually comes out on Raw the next night calling out Taker... He then proceeds to show humbleness and ultimate respect to Taker which Taker returns...
This in turn will give Miz the ultimate rub from The Undertaker and also the ultimate push as the new top man in the company, it also elevates him to Cena, Rock, HHH, & Austin status, and it turns him into a solid face... Which the wrestling comunity is already dying for anyway, and it also allows Taker & WWE to properly have used that streak to elevate someone who can carry the company like Hogan, Austin, & Cena have AND as HHH said the streak dies so now the Undertaker dies to... But he dies in a classy way elevating another talent and showing why he his 1 of wrestlings most respected stars...