I second the navy idea. A level on a boat or naval aircraft carrier floating out on the sea as a giant rises from the sea would be a good scenario.
Thanks @dannyboi7
Another screnario idea:
The Leviathan
Somehow Bioloks has developed new giants that can breath underwater.
And three of them are approaching towards the underwater fortress Leviathan that hides the secret weapon.
Fight them before it’s too late.
