gamespot,then on top of the page search for gamefaqs click on it,then when your ther click 0n playstation 2,then on "D".search down for it.
List of confirmed characters.
lord slug{normal,big form)
android13.(normal,super form)
I'm positive about the big form for lord slug cause I saw a pic of him fighting ss3 goku. and no tapion is not confirmed yet. and it's suppose to have in game transformations.