The new trailer for Arrow's upcoming seventh season makes it clear that there aren't any heroes in jail. After outing himself as the Green Arrow at the end of last season, Oliver Queen is behind bars, surrounded by enemies he has put away in the past and inmates who want to earn a name by beating him down.

Not that things are any better in Star City. Someone has been running around in a Green Arrow costume, attacking people. The members of Team Arrow are powerless to stop him if they want to maintain their secret identities. And, of course, Ricardo Diaz is coming back to town with an eye on payback and making sure Oliver pays for defeating him last season.

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Thanks to the inclusion of Sunday nights, The CW has migrated Arrow over to Monday nights for this season. This year will also see Oliver and Team Arrow join the Flash and Supergirl to help bring Batwoman into the Arrowverse during their now yearly crossover event, which may also include Mr. Freeze and his wife, Nora, in some capacity.

Premiering Oct. 15 on The CW, Arrow stars Stephen Amell, David Ramsey, Emily Bett Rickards, Echo Kellum, Juliana Harkavy, Rick Gonzalez, Katie Cassidy and Colton Haynes.