Because SHMA doesn't have enough Godzillas already? We have GMK and '54 arriving soon and then we get this mess on top of it. Having some enemy monsters for Godzilla to battle would be nice, Tamashii. And maybe ones that aren't from the Heisei era.

Why am I being quoted here?! How does the bikini paint job change the fact that it's another Godzilla? He's the titular character in his movies; complaining about too many Godzillas is like saying why are there so many Batman toys in the Batman toyline. I'd prefer to get some other monsters too, but if they're going to stick with Godzillas, they could at least make one that I would actually want to buy.

Godzilla Color Robot Damashii - Eva Unit 01 would be neat. However I don't think Tamashii Nation does Eva anymore. Revoltech has been doing Eva stuff for a long time now.

Closes thing we going to to robot cross over with Gundam

It'd be a healthier line if they released new monsters. There's something telling about the last new monster having been released at the beginning last year. If repaints were truly helping this line get new sculpts we would have seen it by now. And not just different renditions of Godzilla himself.

You say that, but I really doubt that's the case. When it started MonstersArts was pumping out a huge range of characters across multiple franchises as both mass release figures and web exclusives. It even clearly had plans to move into anime territory as well, given there have been both Macross and Evangelion MonsterArts on display at previous events.

While there's absolutely no way of gauging how successful web exclusives are, the fact that the mass release figures rarely immediately sell out on preorder and often end up discounted after release (not quite as bad as Sentai SHFs, but the point still stands) is pretty telling. And I'm talking about Japan's sales in all of this since I have no idea about Bluefin's sales, but I follow enough people on social media to know Amazon end up discounting half of them at some point too.

Bandai aren't stupid. If they're only producing Godzillas it'll be because Godzilla is the only thing that sells well. The money isn't in highly articulated expensive kaiju figures, its in vinyl toys.