I think you'll get quicker answer by asking this from Arcanum Worlds directly, as Roll20 usually only talks publicly about what publisher allow them. It's unlikely that Roll20 would share at what stage this possible Roll20 addition would be, or whether even any talks have started about this. Just because someone says on their Kickstarter that they will have a Roll20 character sheet/module/compendium, doesn't automatically mean they've actually talked with anyone on Roll20 about it. Some time ago, I encountered another finished Kickstarter which promised a roll20 sheet, and it looked like they chose to approach the Roll20 community in general for finding a sheet, instead of directly opening a line of communication with Roll20 in private. Edit: Nevermind, I went and read the exact wording of the post, and by their own words they started talks with Roll20, and in a comment they said Roll20 approached them. Still, my original opinion stands, you're more likely to get info from Arcanum Worlds, than from Roll20. Edit2: Well, would you look at that, in a reply from 23 days ago, Arcanum Worlds said : There will be official plugins for Roll20 and Fantasy Grounds. They’re
in development now. DnDBeyond is a possibility but we haven’t done
anything with it yet.