Minato Suit is in the Fireworks event. And there is not way they are going to give ninjas like Edo hiruzen or Edo itachi for free, They are going to put ninjas that no one is buying anymore. Ninjas that are out of meta for some time now. We did get lucky few times to get ninjas like Shisui or Konan 40 frags but most of the times it will be some useless ninja that no one is going to use.