Please note the existing discussion on Android updates is here.
Beta testing may be complete but it's likely that Samsung will be working on the bugs reported during that time. Once they're done then they'll release the update to carriers for final testing. How long it will take Samsung in this stage is anyone's guess. Samsung historically has had a 6-9 month delay between when Google announces the major update to when Samsung flagship devices end up receiving it. Part of that can be from updates being pulled due to bugs.
Best we can do now is wait for Samsung to announce the release which hopefully will happen soon.