Sonic Heroes focused things down a bit more ... and you must complete each team’s individual story - plus collect all seven Chaos Emeralds - to unlock the final boss fight.

Zazz's appearance of chaos makes him seem dangerous ... struggles to match him in battle. The Sonic universe is packed full of powerful characters, heroes and villains alike.

Perhaps it's that chaos that will lead to the mash-up between the heroes becoming literal, as Sonic is mashed-up with Flash, ...

The Justice League has worked with a lot of amazing heroes and teams in the past ... the second issue shows Darkseid wielding a Chaos Emerald as Sonic and the Flash unite to stop him.