It is either Tea Gardner (DSOD), Yami Yugi (DSOD), or Aigami/Diva. I doubt Tristan Taylor (DSOD) or Ryou Bakura (DSOD) would have any new cards from the movie.
Why does everyone seem to think a Yami Yugi DSOD is set in stone? I'm not saying they couldn't do it if they really wanted to. But there have been no leaks about him being a character we can use.
Anoymous
Ho Lee Fuk