The next four games are, in order of Simple series number, THE Party Casino, THE Shooting Action, THE Block Kuzushi, and THE Wai Wai Combat. A Block Kuzushi game actually came out in the U.S. for the DS, under the name Break 'em All, so there may be a possibility of a similar release on the Wii.
If Data Design Interactive can get away with PS2 shovelware on the Wii, then we don't see why D3 can't make some original budget software and market it worldwide. We've always wanted to see the Simple brand in the U.S. There's something refreshingly honest about making the "budget-ness" of a game apparent right away.