[Fish Sandwich]

Kiva and Go-Onger teaming up would be hilarious. It'd just be poor shy quiet Wataru getting *completely* overwhelmed by the chaotic energy of this group of eccentric strangers the whole time. They'd out-crazy Nago! Castle Dran would combine with Engine-Oh to fight a giant monster because great justice... or something! Tie it all together with Wataru learning to take some inspiration from the team's boundless self-confidence and positive attitude, and you might even have a story to tell while you're at it!

...Then throw in a haphazard assortment of cameos from other actors, focus on completely different characters for the majority of the run-time, do nothing exciting with the action, and you have a properly underwhelming SHT film that practically writes itself!