i guess there was some energy source within the ground that cracked up and then hopper somehow absorbed its energy and when used its overdrive it went in outer space. There it met the juggernaut. so it looks like the juggernaut on earth was captured or trapped or something and some aliens attacked and then some mysterious energy source reacted to the arrival of the aliens these rico and thunder were trying to find, somehow rico absorbed it and went in space. NOw it met the juggernaut's hologram which prbly tell hopper " Kid the fate of earth lies in your hands" , (might not be the case bcz hopper doesnt have any hands xd) so the jugg might tell hopper a method to revive or relase the juggernaut so he can fight the aliens or something. but thats all folks cuz it aint UFO day and it aint any aliens around here. also i hate hopper's overdrive so its better it jumps OUT of the map when it uses it OD, they always take that goldbox in the silliest method EVER!