I can confirm that the second hero from this expansion will be Boromir. It was told in the french editor magazine. But no intel on its effect, only the name was revealed.

Shiv@n said:

Well I guess that it makes sense he would (and not Faramir) since he is the heir to the stewardship (and not Faramir), but if we don't get a Faramir hero I'll be very upset (and probably not just me, but others too). Also it would be nice if the designers would release the info in English/American sources before third party/language adaptations did, since it's designed by an American company, but I digress.

The designer had confirmed we were getting Faramir hero a long ago, no worries. At the same interview Spirit (or Tactics) Glorfindel was mentioned.

But for now, the let the wild speculations of Boromir begin? Leadership? Same stats? Would be cool if he quested a bit more, we don't really need another killer. But if Leadership, he might rather get resources or stuff. Perhaps get as strong as the resources in his pool? The guy on the French forum said the Pelargir girl combos well with him, so?

im not sure, but it should be something that shows his proud belief in gondor, perhaps have a very powerful effect with a risk of a downside