We caught a glimpse of Mera from the Mattel Multiverse 6" DC series at SDCC 2017. We've now got the promotional images.
Mera is of course the better half of Aquaman. She will play a part in Justice League (November) and will then return in the 2018 Aquaman movie. She is played by Amber Heard.
The Mera 6" figure will be released in November. She is supplied with an alternative pair of hands, with the second pair complete with water fx.
Amazon (US) are already taking pre-orders on the figure for $19.99. You can order to UK at a total cost of $30.97 inc import fees and delivery, that will mean UK customers are paying about £23.90