dummyAlso, Blizzard being shaky with new IPs ? Havent they only released heroes of the storm? That game definitely seems like a failure, but I don't think anyone can really compete with LoL/dota2 at this point. OW is kind of a new genre and its unfair to measure its chance for success with HotS poor results, considering it was an attempt to take on the two biggest games in the world. Just a completely different situation.
The game was in alpha/beta last year and has only truly been released to the public during June of this year. I wouldn't say it seems like a failure to soon, it's doing decently well in viewership though not as much as many would have expected.
There are pro teams such as complexity, Cloud 9, and MVP being part of the scene, as they also have the KR's approval a bit. It'll take time for the scene to grow, but the game itself is very casual and easy to learn considering there are no items, you could really the basics of the game within about 3-5 games which is important for gaining players. If there ever was a competitor to Dota 2/LoL, HotS has the biggest chance compared to all the other MOBAs that have failed. Also I'm a Dota 2 player so hope I didn't show much bias, just my insight on HotS. In the end it's a Blizzard game that is free, so it'll do fairly well for a while I would guess, as long as they continue to update and make good changes of course.