A couple of weeks ago, Paul Heyman was a guest on the Stone Cold Podcast, which you can hear exclusively on the WWE Network for the low price of $9.99 (I can't say WWE Network without saying $9.99)... Well, during that podcast, which you can read more about here, Heyman bluntly asked Austin if he'd face Brock Lesnar at WrestleMania 32 in Texas. Austin went into character immediately and cut a promo about how he'd kick his ass.
Fast forward to his recent appearance on Chael Sonnen's podcast, which you can listen to here (the Lesnar part is at the start of the interview) and Heyman has explained that he thinks it's an impossibility. During the interview with Sonnen, Heyman admited that he caught Austin off-guard with the question and that he couldn't possibly sit with Austin for an hour without asking him about fighting Lesnar. He then admitted that the chances of it happening are "zero percent," which is much lower than the 100% we were all hoping for.