Calling Bertram Red John is to mock the real Red John, that was obvious.
Bertram is scared to get caught and he gets stuff from a vault by the name Thomas.
We could see wine in the vault.
Wine is famous and made in Napa Valley.
The sheriff of Napa Valley has the name Thomas McAllister.
Red John used Reede Smith to get information from the FBI, so Red John isn't an FBI agent.
If we can trust the list of 7 suspects then..:
Brett Patridge is murdered, Bob Kirkland is murdered, Bret Stiles, Ray Haffner and Sheriff Thomas McAllister have died in the garden house bombing.
Then this could mean that Red John is going to be resurrected from the 'dead'.(He survived)
Thomas is scared of pigeons, he has the same build as the guy who walks in the church and the same hairline as the one who jumps through the window.
If we don't focus on the promo, Thomas was always into mini games with Jane, he likes him somehow and it could be explained in the next episode.
We have to remember though that promos are cut and paste work by a person who wants to trigger a certain conclusion by the viewers.

It could be that the resurrection of one of the dead guys, probably Thomas will be the twist. Or it could be a bigger twist. Bruno probably knows that people are researching on their own. He is a great writer, and it takes courage to reveal Red John already in episode 8 instead of the season finale.

Nick Nordella is going to act in episode 8 as the young man. Make comparison between the two photos.
http://www.ddoagency.com/images/artists/artist_1301425352_43_l.jpg
http://www.magweb.com/picts/nm0075359.jpg

I think the bright blue eyes and the mouth do look alike.

A bonus for the BP fans:
http://famousdude.com/images/jack-plotnick-01.jpg