Possible Willie Nelson Guest Appearance On Upcoming Megadeth Album?

Earlier this evening, Dave Mustaine ran into country legend Willie nelson at a restaurant in Austin, Texas. Mustaine tweeted "Willie Nelson is in the restaurant I am eating at. I just met him! How cool is this???" Shortly after, Mustaine took to twitter again to post a photo of him talking to Willie about a possible guest appearance on the song "The Blackest Crow", which will be featured on Megadeth's new album, "Super Collider".