I think they've said they can't properly emulate SAM so anything from WPT forward is out, although anything other than WPT would be a huge license anyway. So yeah, I'd bet on RCT, HRC, Monopoly, Sharkey's, or maybe Seawitch. Here are the results of the Stern/Sega/DE poll done last year:

Poll #6 : Stern/Data East/Sega

1) Tales from the Crypt (Data East, 1993)
2-T) Monopoly (Stern, 2001)
2-T) Rollercoaster Tycoon (Stern, 2002)
4) Adventures of Rocky and Bullwinkle and Friends (Data East, 1993)
5) High Roller Casino (Stern, 2001)
6) NASCAR (Stern, 2005)
7) Time Machine (Data East, 1988)
8) Sharkey’s Shootout (Stern, 2000)
9) Seawitch (Stern, 1980)
10) Viper Night Drivin' (Sega, 1998)

Pretty sure the next table is Bad Cats.

The picture also has a hidden paw print and whiskers. I think the BSD guessers are over thinking it.