Some fans are still probably a bit miffed that Riot Games (maker of League of Legends and that’s all) teased them about the possibility of an MMO. But it seems like the studio’s parent company is pretty miffed at Riot in general. Gamasutra cites a report from several anonymous sources (which is unfortunately behind a paywall) that China’s Tencent (owner of Riot) and Riot are not on cordial terms due to differing opinions about mobile titles and the reported decline of LoL‘s playerbase.
The short version is that Tencent wants more mobile titles (which Riot does not wish to develop) and has shopped out something just short of a clone to other studios, while Riot is dealing with dropping numbers as other games move into the spotlight. An official statement from Riot disputes this report, stating that the company is happy with LoL at its current numbers and it remains a vibrant community, and relations with the studio’s parent company remain positive and supportive.
It’s also worth remembering that the studio does appear to be working on something new. Equally relevant are the issues surrounding any new games in China, with Monster Hunter World running into trouble and Korean developers unable to publish there.