Renee would be good in a Gotham Central revival or a solo where she's a PI in Gotham. Her being Question II is fine but it lost appeal once Vic came back. You could try to find her a new ID or come up with a new one like what Watchmen 2019 did.
Most of the choices are c-listers with a cool concept/niche. So in a potential solo series, you'd have to figure out who they are/were. For example, who is Fire when she's not with Ice and the JLI?
Jess and Kyle just need a title like Far Sector or JL Oddysey. They need something to do on their own or a team where they aren't a second-stringer.