So far it looks to be Ramon Paradoa directing Sinners and Bloodengutz, Matt Flood directing Madlands and Cybergoria, and I believe Charles Gray directing J&O.
As for designers, Dylan Kollath is working on J&O, Manuel Cordero on Sinners, David Hughes on Cybergoria, Nick Collins is doing Bloodengutz and a newer designer (Cam Batz on twitter) is working on Madlands, who is also the one who pitched the idea.
I don’t think details on the treatment and design for ST5 have been disclosed.
All this was found via tweets among the creatives and what was discussed in the published articles.