I have been watching Kuuga and i noticed some similarities with Zeztz power up progressions
The color scheme of the power up progression is the same with the power up form being yellow related to lightning, there is the obvious difference that Kuuga upgrade all his forms while Zeztz is only plasma with maybe booster being the general upgrade but we have only seen it once so far so i cant really tell and i just saw Godai unlock stronger purple [forgot name] so i also cant say what will happen with Kuuga.
Also unrelated to Zeztz but its interesting that aperently the upgrades will come in reverse order from when they got unlocked with Titan (remembered it!) being first and Mighty being last (why does red break the naming scheme?), i find it nice to see the other forms getting more of thekuuga sp spotlight that Mighty is hogging for itself. Its soething that i think Zeztz handles a little bit better since the ability to use the capsems powers without having to transform into them means that they can show up more while the new toy gets to be the transformation.
Edit; i watched some more and i think i know where green getting fucked over came from. Also i havent watched 26 yet but it be funny if when Godai returns the gun it comes back as a weird eletric rifle from the upgrade
