**Editing OP to mark as solved, hope anyone else same issue on steam will have it work with step I did below
1-the game still locked out issue seems to be a Steam issue, because Steam store had Blackwood locked -for me at least- until ~8am PST, then finally the store updated from approx 2 hrs to unlock to 'now available'
2- Blackwood content not unlocking in-game for me after that seems to be due to not using Steam client to launch game at least one time after the above unlock was lifted. I normally login via direct eso64.exe and just type in my login credentials. But after viewing my 'in library' confirmation in steam client for 10th time since this problem started, I noticed the 'Play' button now available (after the above steam store unlock from pre-order to 'now available'
So I launched game that way and immediately got the Blackwood cinematic trailer, and once in game everything was solved. Got the in-game mail with both my pre-order and launch day bonus items, the map shrine for Blackwood now shows as unlock and available to travel, etc.
So if have this same problem and on steam, try logging in via the steam client play button and not direct login.
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ESO client updated the new patch files, and my steam library shows Blackwood owned and installed under owned content/DLC in properties menu.
But in-game I get the upgrade to Blackwood notification and Blackwood map shrine shows as not owned/unlocked. So went to Steam store to check and it verifies I own Blackwood and is tagged as "In Library" but the desc still says Coming June 1 - with "This game will unlock in approximately 3 hours"
Are the ppl currently playing Blackwood doing so via direct purchase from ESO website I assume?
Edited by Jacozilla on June 1, 2021 3:15PM