Ya I may have exaggerated a bit. I trust them as well, but you never know what can happen. It also wouldn't be a surprise to see more than one power considering Infamous 2 utilized more than just electricity as well.
It was really just something I was thinking about a few days after the trailer. Sorry. And to be 100% fair they did tweet out that the trailer contained gameplay with different camera angles.
I thought they could be pretty similar but I actually never got around to playing FoB so I couldn't comment on it. It would make sense.