Hmm... since we got Ghidorah, do you think another sculpt might be in the near future? Aside from the anomalous Monster X, this line seems to focus on classic Showa designs. Might Megalon or Titanosaurus be on the horizon? Maybe a Rodan? Perhaps Anguirus? All of these possibilities sound tantalizing to me.
Gigabrain likes to take their sweet time. After several releases in 2007, Gigabrain didn't release anything for nearly *3* years until 2010 when they unveiled Hedorah. From there, we had to wait until this past April 2012 for King Ghidorah. On the bright side, as least with Gigabrain, the long waits between figures are usually worth it as they rarely disappoint.
As to which figure we would get next....well, as mention earlier in this thread by Legion, GB tends to release figures not covered by Marmit (hence the long standing rumor that GB is really a Marmit subsidary...this hasn't been confirmed nor denied). Most likely a showa character not yet covered by the Marmit MH line...but then again, GB can be a little unpredictable (see Monster X). I honestly hope their next figure is *NOT* the ones you mentioned, despite how awesome they would be. Marmit's MH Megalon is fantastic, and Xplus and other companies have made terrific Megalon figures...he's far from a rare kaiju when it comes to figures, so I'm not itching to see another one (what would be the point?). The Marmit MH Titanosaurus is damn near perfect and would be hard to top...same goes for the smaller Bandai figure. The MH Angilas was amazing, and the same goes for Marmit kit and Xplus Angilas. Now, Rodan would be very intriguing if they did the 64 version of him (to my knowledge, only Pilot Ace has done a real figure of the 64 Rodan, and it's harder than hell to find). Hell, I wouldn't mind even seeing a Rodan 65/68 figure from GB, as I think the 30cm Xplus figure is extremely lackluster and perhaps one of the most overrated Xplus figures. As others mentioned earlier, I wouldn't mind seeing a GB Space Godzilla, as Marmit really dropped the ball with their horrible SG figure.
GB, give us GABARA
already damn it!!!!