Samus won't be playable in Dead or Alive Dimensions
Speaking to Eurogamer, Team Ninja leader Yosuke Hayashi countered this assertion. "This time she's not playable," Hayashi said. "But Samus Aran will be shown in the game. She comes to help the player. That's the collaboration shown there [in the trailer]." Hayashi suggested that a playable Nintendo character ran counter to the team's goal with Dimensions, which is "basically to create the best version of Dead or Alive."
As for that non-playable appearance, it'll be an unlockable bonus. Hayashi encouraged players to find out how to unlock the bounty hunter helper on their own.