What are the odds of an Arrow Black lightning crossover?

With the addition of Black lightning to cw's list of comicbook tv Series, the show has not revealed whether it is part of the Arrowverse or not. Although it has made reference to metahumans, supergirl and a host of other arrow 'pointers', it has not been established if it is part of the arrowverse or not.

When Arrow's Christian Amell was asked this was what he had to say, 

"Everyone pretends like we’re not going to eventually cross over with Black Lightning but we’re probably gonna cross over with Black Lightning because that’s just the way that the world works... I think that anything you can do to expand the universe and to build out what we’ve built on our show would be great. So, I’m glad that show’s doing well, I hope that it has a very successful run, and I would love to be a small part of it in some way shape, or form."

Although, if a cross over is being considered, one would hope to see it happen between the arrow himself and  and Black lightning because of their similarity such as both sharing the same nitty gritty kind of story and all that talk about morality, I would be looking forward too seeing kick it with the rest of the crew. What do you think?