He most certainly cannot RUN for President again, and since he's ineligible to run for Prez, he couldn't run for Vice-Prez. BUT he could come up in the Line Of Succession. The chances of his doing so, however, verge upon the mathematically impossible. The easiest route would be House Speaker, but that takes the votes of a majority of the members of the majority party. Anyone in Congress who votes for Willy for Speaker just term-limited himself to zero. In other words, it's mathematically possible but politically unthinkable.
Michael
On a side note, I don't understand what all the fuss is about with regard to this VP thing. If we're willing to assume that (1) Hillary can get elected president and (2) she's willing to do so for the sole purpose of letting BJ be president again -- both of which we have to assume for this ascension-from-vice-president scenario to take place -- then he can act as President without ever having to assume either office. (She can just let him make all the decisions without the title.) I don't think either of those assumptions is justified, but if some people do, I can't understand why they're getting upset over whether he could get the TITLE back.