Summoners! Hi, I am Nate, and work with CaptSturm and Belliss. I am happy to report that the process of restoring missing inventories has begun and will continue throughout the night. Some of the more complicated restorations will continue to be worked on throughout the weekend, but rest assured that they will be restored in full.
To answer some of the recent questions, you will not need to relog in order to see your restored inventories. We will be sending out emails to each of you in the morning confirming that they have been restored.
Our database professionals have been able to identify each of the accounts that have missing runes, rune pages, champions and skins. There is no need at this time to submit tickets to our Player Support if you are missing these items.
I plan on staying here at the Riot Games offices until this first batch has finished up so that we can verify that it ran successfully.
TL, DR: 80+% of the accounts should be fully restored tonight. The rest will be done over the next couple days.