Proper cricket would be nie on impossible to achieve on the wii, this is for many reasons:
1. Bowling would be uber arcadey as the wiimote has no seam so swing and spin would not be possible to apply properly like you would with a real cricket ball
2. To hit a cricket ball in the desired direction you have to have your front foot pointed to where you want it to go, which again isnt possible to incorporate with the wiimote
3. For the people who play with player controlled fielders how are you meant to stimulate catching the ball with the wiimote as surely it would already be in your hand
It would be possible to add spin and swing with the press of a button and the tilting of the remote but that isnt exactly realistic, or fun. However i do feel that a wii sports style cricket game could be released on the VC or something which was really arcadey style cricket like baseball on wii sports, i just dont feel a realistic cricket game would be possible.