DC's "Legends of Tomorrow" is, thanks to its time-travel premise, so dynamic a show, and with every subtraction from the main team comes new additions from the deep DC Universe.
The first season finale already gave us a rather short glimpse of Patrick J. Adams as Rex Tyler AKA Hourman from the Justice Society of America, and 'Supergirl' added his supporting character Snapper Carr. The newer additions to the "Legends" cast, however, bring about some very interesting possibilities for the second season.
According to Moviepilot, the first new addition is Nathaniel Heywood, AKA Citizen Steel, a man (metahuman, we assume) made out of living metal. His character origin in the comics is tied heavily to Vandal Savage and his neo-Nazi group the Fourth Reich. Even though the "Legends" got rid of Vandal Savage, nobody ever really goes away, and Citizen Steel's introduction might lead to the possibility that Savage and his influence isn't truly dead yet.
It's also worth noting that Heywood got the 'Citizen Steel' name from Power Girl, who herself is another-dimension version of Supergirl. There might be a likelihood that Power Girl could be brought in to any of the CW shows (considering 'Supergirl' is now going to be on the network).
Another addition to the "Legends" cast is Vixen, but a different Vixen from "Arrow"; the "Legends" version is the ancestor of the "Arrow" version. Both Vixen and Citizen Steel have endless possibilities before them, due to the CW's penchant for rewriting characters.
Aside from Heywood and Vixen, there are also casting calls for two other characters in the series. One is for a "Han Solo" type of metahuman character who has a backstory involving his grandfather, a World War II hero. Another is for an African-American woman, a soldier from the same time period who's seeking vengeance for her companion's death.
For what it's worth, the new additions certainly mean an exciting new mission and villain to take on. The second season of "Legends of Tomorrow" premieres on October 13 later this year.
