The Myer website has now ticked over, updating the Kingdom Deluxe and Voyager listings, which didn't previously have any discount. Unfortunately, they have applied the 20% off discount not the promotional discount, so the Deluxes are $27.99 instead of $24.99. Hopefully someone at Myer will spot that soon. The Voyager promotional price is the same as 20% off anyway though.

https://www.myer.com.au/b/Transformers