Eh, no.

First, is there some kind of international treaty we can sign that would bar Benedict Cumberbatch from doing American accents?

Second, "risky and dangerous alternating current"? Seriously???

Some pretty nasty stuff was done to discredit AC current during the 'War of Currents', such as Edison electrocuting several animals.

I also agree the casting choices seem poorly made, my mental image of Tesla certainly doesn't include him playing pool.
I think Bowie's portrayal in Nolan's The Prestige was great though.

Edit: Turns out I was wrong. Tesla was quite the pool shark.

The trailer appears to be showing Edison as the plucky inventor being steam-rolled by the evil capitalist where in reality, Edison was a colossal asshole.

AC is a vastly superior system for electricity transmission and Edison actually had the opportunity to use it, but again, he was a colossal asshole.

This.

Edison was basically the Steve Jobs of his time.

As crappy as Jobs was, was he really also a patent thief?

Whatever your feelings about Jobs, he wasn't nearly as bad as Edison.

Jobs never electrocuted any elephants or killed any employees with radiation. And whether or not you like Apple products, at least none of them were the electric chair.

All of which Edison did, because again, colossal asshole.

I am also concerned how Westinghouse is protrayed. He is widely considered a Workers' hero from that era.

I found a few reviews that may shed some light on how these men were portrayed. I get the impression Edison is the jerk and Westinghouse the better man.
-http://www.vulture.com/2017/09/the-current-war-is-absorbing-but-never-snaps-into-focus.html
-http://www.indiewire.com/2017/09/the-current-war-review-benedict-cumberbatch-tiff-2017-1201874791/
-http://variety.com/2017/film/reviews/the-current-war-film-review-1202553511/