I can't read it but could the fact it kinda looks like am ice cream sundae have to do with it? I'm assming it's supposed to be a pun on ice, like frappe-ice. If it's pronounced like 'is' then I'm wrong

Yeah, it's pronounced like the English word, is. Hiragana is generally used for Japanese words, so I guess there's some word ending in "izu" which is being used as a pun here, but I'm not sure what.

The Over Master Gavv seems like an interesting final form. Wonder what'll be the source behind it?

Gavv ate all kinds of snacks with gummies as his main motif. Upgraded form was a cake representing his birthday and then came ice cream as his super form.

Will this final form be gained by humanity finally accepting Shoma as their hero & not to be feared of as a hybrid?

Seems a tad...cruder, compared to other Final Forms or Gavv's past forms. But maybe it'll feel better in actual suit form.

It annoys me a little that the gochizou's third eye looks different from its other two, not sure why they did that. But otherwise it seems like a perfectly fine second-rider upgrade trinket, nothing too exciting but it gets the job done

It's symbolism. The eyes are different to represent getting help from the rider's buddy for the power of that third eye which signifies an awakening; showcasing Hanto's growth as a person.

I had a theory today. After Suga became Bake we saw that it damaged his body.
With Hanto getting his upgrade next episode, this could be the end of Suga.
However, I think that he may copy his mind onto one of the Shoma clones.
Considering he made the Valen and Bake gear, and the clones, it would not surprise me.
Also, we also have the images of Bitter Gavv with the BakeMagnum, so who knows.

Someone on Twitter had a similar theory. But instead of transferring his mind into a Shouma clone, he transfers his mind into "K" after modifying it so it can become Bitter Gavv.

I was hoping Vram destroys the manufacturing factory of Shoma clones, but Dente orders him to get a bitter gavv from one of the clones to research on.

And hopefully Jiip becomes Bitter Gavv once Bake & Nyelv find Dente's hideout and force him to surgically turn Jiip into a hybrid like Shoma.