Mia's use of Super Mode, and likely Super Mega Mode, and a zord battle featuring the Bull Megazord, the Clawzord, and the Samurai Megazord.
They've kinda pushed themselves into a corner with all these zord suits. They HAVE to use the Black Box in order to pilot the Samurai Megazord without Jayden and Antonio. Meanwhile, apparently the Shogun Mode is needed to activate the Bull Megazord's finishers. Shogun Mode looks to require at least Super Mega Mode, since that belt buckle is gonna be important.
As far as I see it, the options are:
a. Have Jayden activate Shogun Mode from Shark Attack Mega Mode
b. Cut one of the Megazords out of the battle to free up a ranger
c. Create a completely new battle.
I actually think option a is the most likely, but I'm definitely interested to see how it plays out.