you rarely see a surround with brick continuing on both sides. i think it would look odd...

That brick wall is a bit unusual. Don't normally see the brick continuing over the doorways.

I think a surround would need to cover the brick completely between the 2 openings, and the mantel would need to be that wide as well.

i have 2 whole wall brick ones, found they were definitely improved by a floating wood matel. mine are at least 4x4,as rough as you like.

HI -- Love that wall .... how about three beams staggered in from each side for a more modern look . Or look for a cast iron mantel surround or I think a big thick cast concrete surround would be stunning . It all depends on if you want Traditional or Modern look. Lots of ideas for all of these on Houzz .... just do a search !

I think the brick looks a little bland and uniform ...and since it covers such a large area I can see why adding a surround would be a good idea...

what the surround looks like should tie-in to your style and decor or even start a fresh new look for you ...

a little research in Houzz photos should offer many options to see if just a mantle or a whole new surround will look best

long wood mantel. you can do this yourself for next to nothing. (or you can purchase a reclaimed wood beam for a few hundred!)

go a HD or a lumberyard and get a 2x6 or 4x8 douglas fir beam. cut it to your specified length that you want. beat it up a bit w/chains and stain a rich walnut/java color. attach to the FB using lag bolts. We did that with our for about 40 bucks.