While fans are rightfully getting angry and impatient over the constant Sombra teasers despite the reveal happening at Blizzcon whether they follow the ARG or not, Blizzard might be trying to deflect criticism by promising a PTR stage larger than any before it.
Planned for "later this week", it's going to be "around a bit longer than before." says Geof Goodman, principle designer of Blizzard's hit shooter Overwatch. With the extra time available to them they're "taking this opportunity to try out some more significant hero changes, and the push more significant iterations throughout this PTR cycle,". But there's still no Sombra test. Of course there isn't.
Just to prevent adding potential fuel to the fire, the announcement doesn't even mention her in any shape or form. Instead, it makes it painfully clear that despite being a significant PTR update, Symmetra's large-scale changes won't be available to try just yet either.
With the length of the test period being longer than before, there's bound to be rumors as to the true purpose. With the latest "this is it" portion of the Sombra ARG bringing nothing of worth fans have now shifted their expectations for the reveal from weeks ago, to... Monday. So the idea now is that Blizzard want players to test the legacy character changes before those 6v6 Sombra match-ups start immediately after.
It all sounds just as far-fetched as usual. Want to get involved anyway? You'll be able to download the latest Overwatch PTR client from Battle.net soon.