The mention was edited out when video of the segment was uploaded to WWE's YouTube channel, possibly indicating an ad-lib undesired by WWE. The spike in searches of AEW on Twitter immediately after the promo justify WWE's choice to scrub the verbiage.
So was the AEW mention authorized by WWE? That's not clear.
Dave Meltzer and Bryan Alvarez were each apparently given conflicting information on the matter, with Meltzer saying the line was WWE-approved, while Alvarez claimed the opposite. Each man cited a different source from the production meeting, while not ruling out that WWE could be "working the boys" by scripting something and then later claiming that it wasn't scripted.
That wasn't the only mention of AEW on the Raw broadcast. At one point during a commercial break, the Kansas City fans loudly chanted "A-E-Dub", with Shane McMahon standing in the ring.