At this year's Comic-Con, a lot was spilled about Hawkman (and Hawkgirl), and what we can expect to see from them:
As it was announced during the DC TV panel at San Diego Comic-Con that Hawkman will show up in the DC anthology series. As in the comics, the two heroes will be the latest reincarnations of two lovers who have been reborn many times over 5,000 years, but before he gets involved with the series’ protagonists and their time-traveling hijinks, he may be appearing on the shows that Legends of Tomorrow will spin out of. - cinemablend.com
And if he is going to be added into Arrow and The Flash, it will certainly add more context to his character. And as for who's playing him? Well, the person playing him has not been confirmed as of yet, but as the month of October nears, we should get to know as to who the lucky person will be.
It seems to me that all of the heroes from [DC's Legends of Tomorrow](tag:2937021) will be explored in the new seasons of Arrow and The Flash. It's confirmed that, before she joins the L.O.T, Sara Lance will be resurrected on Arrow, they'll probably go into Ray Palmer's survival of the explosion. Also, The Flash will be exploring and explaining many of the Firestorm situations at hand, since only one of them (Victor Garber) will be in Legends.
WHAT CAN WE EXPECT FROM HAWKMAN?
Well, from what we know, Hawkman will be a very 'charismatic and a natural born leader' type of character, with a lot of confidence, sooooo... not exactly like he really is in the comics. But hey, the dude's 5000 years old. But unlike Hawkgirl (who will have no memory of her resurrections or past whatsoever), he will have all of his memories of his past and MANY resurrections.