See the statement.
Megadeth frontman Dave Mustaine said in an interview with a Detroit radio station that he's excited to tour with a band he hasn't yet revealed
“Believe it or not, we have some really cool things planned for the US tour. We have two incredible things we're going to do. We're going out this spring or summer and we just heard about an opportunity at the end of the year that really excited me. It's someone we've never played with before and we're going to be opening for them. They were so nice that we decided not to headline just to support this group.”.
Mustaine was also referring to the Grammy nomination that Megadeth received for the title track of their latest album, "Dystopia": "I think it's great to be nominated even if you don't win, because you get that recognition from all your peers and from people who don't know who you are."