A 3-D Yoshi Game? Maybe. What I really want is a Super Mario Game (e.g. Super Mario Galaxy) and implement Yoshi. You know, you could ride him around. Back to his roots in SMW. But, WITHOUT the Juice thing from Super Mario Sunshine (or Shunshine, as I call it) as that became increasingly annoying as time went on.
Eggs? They're cool, maybe depending on the direction he's facing, and how fast you thrust the Wiimote, you could throw them. Maybe not. I hated the fire flowers in Super Mario Galaxy. Too dang hard to aim. Good thing they were like heat-seeking.