https://twitter.com/Ghostcrawler/status/1339722821761605632
I have news!
My recent job at Riot has been to help develop the League universe, which we’re going to need!
Because it is time. My new job is to kick off a big (some might say massive) game that many of you, and many Rioters, have been asking us to create.
In case you think he's just misdirecting, other Rioters are responding more explicitly. And here's Ghostcrawler himself stating it as such.
It's been about time. World of Runeterra coming soon?