Former ACME QA Tester.
The running joke overhere had been that if Arrow and Supergirl crossover, the meeting Ollie and Martian Manhunter will go somewhat like this:It has just occurred to me that with Ollie having experienced all manner of forces on Lian Yu (supersoldiers, magic, etc), you can probably cross Arrow with just about anything.
Diggle: So Ollie, why haven't you told us about those talking ponies flying over Star City?
Oliver: Well, this one time, on Lian Yu...
Kara:How do you...?
Both in unison: Lian Yu