Introducing a Triple Crown for Four/Five Year Olds

[ScottJ]

What does the community think about a triple crown for older (both four and five year old) horses?

The design would be that three national races would be selected at distance (1 1/4 miles, 1 1/2 miles, and a third distance to be chosen), conducted in the May to October time frame, perhaps including a Breeder's Cup event. The idea would be to win each of the three races not only in a single year, but perhaps over the course of the two years.

Purses for the three races should come in at a minimum of $2M USD. The race locations could be East Coast, West Coast, and perhaps mid-US. Would this encourage the continued participation of three years olds? Would this better capture the imagination of the US viewer and bettor?

Comments sought.