Alas, it had to function as one becauseThe Flashdidnt finish shooting its season before the pandemic shutdown.
So, it would definitely be super unfair to judge it as a finale.
As an episode ofThe Flash?

Colin Bentley/The CW
They decide the best course of action is to find Black Hole.
On the upside, burning down the warehouse means Black Hole loses its leverage over Mr. and Mrs. Dearbon.
In the wake of the warehouse fire, Barry approaches Carver and offers him CCPD protection against his wife.
Unfortunately, Mirror-Singh shows up right as Team Flash prepares to escort Carver out of there.
Mirror-Singh pulls Barry aside and offers him a trade: Iris freedom for Carvers life.
In a not-so-surprising move, Barry hesitates and seriously considers his offer.
But Nash intervenes and smoke bombs/teleports the group back to S.T.A.R.
Labs before Barry answers.
If Im being honest, I low key sympathized with Barry more than I probably shouldve.
I dont know, I just want Barry and Iris to be reunited!
The distance is killing me!
(And Im guessing lockdown is starting to get to me, too.)
Like, look at this guy confidently giving someone the killing is bad speech.
Not only that, but Eva sends Carvers minions to kill him.
And not Mirror versions of them, but the real deal.
She convinced them to flip sides by giving them a choice instead of forcing them into servitude.
(It helps that Efrat Dor gives a commanding performance, too.)
With her suit and/or powers, she turns her arm into a Mega Man-like canon and fires on Barry.
With her husband dispatched, Eva lets Barry and his friends live another day because shes accomplished her goal.
Thankfully, Cecile also arrives with reinforcements in the form of Joe Freakin West.
Honestly, seeing Joe hug everyone on Team Flash was rather comforting.
Of course, the episodes stinger made all of that comfort immediately disappear.
My guess is that Eva freed her from the Mirrorverse for a nefarious purpose.
But, well have to wait until the fall (or probably 2021?)
to find out exactly what happened.
Overall, I thought Success Is Assured was pretty fine.
I want more of Mirror Mistress now!
That being said, I just didnt connect to the episode emotionally.
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