This has had precedent. Years ago during the silver screen era there was a accent that most major movie stars had called the transatlantic accent, it has some elements of British and also American sounds.

https://en.wikipedia.org/wiki/Mid-Atlantic_accent

Also for some reason I do not understand almost all US reality shows and other entertainment(contestant based shows mainly) have to have someone British judging Americans like we are incapable of having our own citizens be makers of taste or standards.