When Alistair Brownlee claimed Olympic triathlon gold in London he did so having swum 1500m, biked 40km and run 10km.
However three-time Olympian Don believes organisational and commercial constraints will see Brownlee and co. race over half the distance - known as sprint - in four years' time.
In addition Don is convinced a mixed team relay will be added to the Olympic schedule in Brazil saying: "I think Rio will be a sprint distance race and a mixed team relay.
"Instead of the top six countries having three athletes and the next six two and so on, I think it will be two across the board with the males and females joining forces for the relay.
"I think the International Olympic Committee will ask how you can have triathletes racing an Olympic distance race over two hours and a leg of the team sprint over 20 minutes.
"Look at the ITU World Series. Hamburg was a sprint, Stockholm was a sprint. There are already world championship sprint for age-group athletes.
"It's an easier sell for TV. If you compact it to 55 minutes for the men, plus adverts and presentations afterwards, it's one hour, done."
- Sports & Recreation
- Athletics, Track & Field
- Alistair Brownlee