The card game Uno came out in 1971, and it hasn't really changed, evolved, or branched out in almost 50 years. So this is LONG overdue: Mattel just announced that they're finally coming out with a sequel to Uno . . . called Dos. Obviously.
It looks like the action is pretty similar to Uno, only you call out "Dos" when you have two cards, and then you get points based on the cards in everyone else's hands.
Dos is going on sale on March 4th at Target and will sell for $6. And no, you shouldn't hold off and wait for Tres to come out . . . Mattel says there aren't any plans for that.