Metroid Database.com

This just in: Dead or Alive Dimensions, the game developed by Team Ninja for 3DS, will have a Metroid Other M stage, complete with a Ridley who attacks you while you fight! And at the end... we see a morph ball Samus jump in and lay a Power Bomb... DOES THIS MEAN SAMUS WILL BE A PLAYABLE CHARACTER? Only time will tell, however seeing as how a character from the Halo universe appeared in Dead or Alive 4 on the 360, I'd say chances are VERY high at this point.

--Infinity's End