From the available information I can imagine there are a whole bunch of Amazons out there. Nozama industry captures a bunch for experimental use, and drugged them to hunt down the others.
Amazon Alpha is a wild one, and Omega is one those in captivity.
Omega escapes, joins Alpha, and tries to fend off other Nozama Amazons.

Anyone know if Amazon Alpha, the red guy, is Taniguchi Kenji aka Tatsumi Nagare/Go Blue?
I cant make out the third Kanji between guchi and shi/ji.

http://taniguchimasashi.com/c_profile.html
Wait till tomorrow for an official announcement.

Oh it is him.:)
Folks Go Blue returns as one of the two Amazons.
I always heard it was Kenji never bothering to check the kanji. My bad.
Good to see him again.
Profile says he recently was busy doing stage plays for Sengoku BASARA and Persona4.

Impressions so far on this release;
I do really like this organic vs mechanic setup they have going on.
It's like seeing Kuuga vs G3.

Who is main focus of Kamen Rider Amazons? Alpha or Omega?

Alpha doesn't have a Gigi Armlet but according to this, To those who don't wear a Gigi Armlet will die in 3 Day! How can a hunter who hunt on 4000 Amazons suddenly become Amazon himself?! and he is played by GoBlue?! That's outrageous! Even Blue Buster will also star in Kamen Rider Amazons! That's even more outrageous!

Omega is a man who can remember the last 2 years but don't remember his childhood?! He have a Gigi Armlet so he is safe unless 4000 Amazons out to kill him! Oh No! Don't kill him off! He like Philip to Alpha's Shotaro! A man who don't remember anything! That's sad! :( but hey! Maybe he will have an interesting chemistry with GoBlue! I mean Alpha! Red dude!

Alpha and Omega sit around the tree! K-I-S-S-I-N-G!!!!! Kissing time!

What in the hell are you smoking?

I love Amazon Omega so much. Are any of them the original Amazon or are they both new riders?

DX Amazons Driver at Premium Bandai. 8100 Yen.

https://pbs.twimg.com/media/Cdy2KqnUYAAiOlr.jpg:large

Hm. That's a little pricey. Interesting that it says Set. Guess it's coming with more than just the belt? I really doubt it's gonna have any sort of gimmick. Wondering what kind of sounds it'd have even. I guess at the least it's gonna light up. Alpha and Omega have different color "eyes" on the belts...hm.

It's also odd that it's labeled "Henshin Belt" seeing as Amazon is one of the few (and only main that I can remember) Riders that does not actually transform with the belt...oh, and I guess it's a Driver now too. Yeah, ok.

http://bandai-a.akamaihd.net/bc/imag...amazons-02.jpg
http://bandai-a.akamaihd.net/bc/imag...amazons-04.jpg

WOW. I love Omega Amazon so much.