https://wccftech.com/diablo-immortal-gets-new-info-from-blizzcon-2019-post-launch-support-will-be-strong/

Diablo Immortal focused all the (negative) attention at BlizzCon 2018 as fans voiced their disappointment for the mobile game's announcement.

This year, Diablo Immortal is far from the focus at BlizzCon as that honor goes squarely to Diablo IV. That said, the developers still shared an update on the game's progress and what will make it a unique Diablo experience. Immortal is considered an MMOARPG and thus features persistent shared zones, four-player dungeons, full Guild and social systems and more.