I was coming to post that. Here is the announcement:
And the trailer:
15-20’ matches, a rewrite from scratch, not all champions but reworked gameplay and a full visual remaster and the champion gallery looks awesome.
They have also announced an animated series that looks like it could be a lot of fun:
With the current excitement of Worlds, these are fun times to be following League. They have gone all out for their 10th year celebration.