Wave 3 Deluxe Siege will be the Deluxe wave for the next 4-6 months... it is noted as a "July" wave by Hasbro for its global release, so to be panicking after just a couple of retail sightings here (that are actually earlier than their scheduled release) is a bit premature.
As stores are currently selling out of their wave 2 stock (most of the stores up here that I saw them at a few weeks ago are now empty, or just have Chromia), the 3rd wave will start being the only Deluxes we are going to start seeing at stores here until the end of the year.