OWL will be running it.
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The heroes will be randomly selected from a group of eligible heroes based on play-rate data from the previous two weeks of Overwatch League matches—only heroes that are being played regularly can be pulled from the next hero pool.
And Jeff confirmed something very similar.
How will you be choosing which heroes don’t make it into the pool? Will it be heroes that are “meta” or will it be a bit more random than that? Or a combination of the two?
it’s curated by us. so it will be a combination of targeting metas that players are being vocally negative about (recent examples: double barrier, goats) and slightly encouraging other playstyles (i.e. “more mobile” comps might be fun for a week…)
but i am sure we’ll refine our approach over time.