[Omnikaiser]

Forgot to mention in my post that I also like the fact there are already plot elements around the belt itself.
It seems to be designed and created automatically after the death of Korenosuke, which implies that appointing his grandson as the next CEO is part of a plan to make him use it and be a kamen rider to fight his foreseen humagear rampage (I guess ? not sure without subs but the scene when they are reading the letter and we see an evil humagear swarm make me think so).

And also the fact the belt comes with a tutorial somehow. I guess it won't explain how suddenly a goofy teen can fight like a pro, but at least we know how he knows how to use the belt and is not omniscient all of a sudden.