During the special event One Piece Dome Tour (which ran in Osaka between March 25 and 27 2011, in Tokyo between April 27 and June 1, 2011, in Sapporo between June 17 and 19 2011, and in Fukuoka between July 1 and 3 2011), a limited edition of NEO-DX Ace could be ordered there at the price of ¥6,300, with an actual release in September 2011. It was advertised as having a "vivid" color scheme, featuring "vivid" opaque flame bursts instead of the regular translucent ones.
Remark: while in Japanese it's called 「P.O.P ポートガス・D・エース ドームツアー限定ver.」, i.e. P.O.P Portgas D. Ace Dome Tour Limited Version, the official translation as shown in the packaging is Dome Tour Limitation Version.
This figure is now released, and available for a very little quantity, so if you would like to have the chance to own it, you can find it in this link. We will talk about this figure once we get better photos and the figure itself! So, stay tuned!