The Seacons have now been listed on TakaraTomyMall for late January... well, two have.
It looks like these won't be sold as a (box)set as "wave 1" is just Turtler (Snaptrap) and Gulf (Skalor), sold as a pair or separately.
The listings show the two toys in full colour, which makes them look really nice.

On the bad side, the prices are really bad, at 11,124yen - about AU$150-160 for the pair (a normal Voyager and Deluxe would be about AU$80 here).