One other thing fans should know is that Joe Wilson is not the same as Grant Wilson, who was Slade’s son in 2046 on Legends Of Tomorrow.
With so little information being handed out regarding Liam Hall’s character, it’s impossible to know how much of Joe Wilson’s past mythos will remain in the Arrow-verse interpretation.
This isn’t some weird Flashpoint twist, however, as both exist within the DC Universe, and there’s actually one more child of Slade’s that could still be revealed down the line.
Given that Joe’s powers in the comics are a result of experimentation on Slade, who didn’t get injected with Mirakuru until after his son’s birth on the series, it’s possible the whole part of him getting powers could be excluded when his character makes his debut on Arrow.