https://tvline.com/2019/11/01/arrow-emily-bett-rickards-returns-series-finale-felicity/

"There’ll be a lot of news coming out about our final episode over the next few months," Amell tweeted (https://twitter.com/StephenAmell/status/1190300812745928705) this morning. "I prefer when you hear it from us. Welcome back Emily."