From what is said in the blog, it should be available everywhere (premium bandai, net shop and stores) (warning : google trad).
Delta Mega is ugly, but let's wait to see the final result.

Pre order : september/october
Release : January 2019

I hope they will do all robots from megaranger later.

Too bad that the survey about super minipla is only open to japan people...

Neoxul

Not much of a fan of Megaranger, but I love Galaxy Mega's design. I might have to pick that up at some point.

Hope we see the Astro Delta Megazord configuration soon. the individuals look good at the moment, but if they somehow add partsforming to a design that, even more than usual, really shouldn't have any, then the team in charge of these will officially be incompetent.

To be fair Delta Mega has always been ugly, and I'd imagine they will do the rest

I really doubt they will add that much additional partsforming to the kits. The most they'll probably do is make the arms of Delta Mega partsform when it combines with the Astro megazord.