They're bringing back Oghren precisely because nobody used him in the first game. I belive I read this in a post by Bioware recently - Most players did Orzamar/Deep Roads last and as a result barely got to use Oghren. Bioware saw that as missed potential and wanted to give him another chance.
Truth be told, Oghren was un underexplored character. A veteran warrior cast aside by the society he fought to protect and reduced to a drunk. However, he had minimal dialogue and you weren't really given a chance to get to know him. He could be a very interesting companion in Awakening if Bioware focuses on him more.
That being said, Oghren is coming back since he's one of the two companions you CAN'T avoid.Sten and Leliana can be skipped. Zevran can be killed off or he might betray you. Shale is optional. Wynne can be killed when you first meet her, or she might turn on you during the Urn quest. Alistair may or may not get replaced by Loghain.
The only other "guaranteed" character is Morrigan, and I don't support bringing her back since it wouldn't make much sense. That leaves us with Oghren.
On a mildly related note, one of my friends is a short, slightly overweight red-bearded fellow who is currently dating a girl named Branka. As you can imagine, me and my mates were laughing quite hard all the way through the Deep Roads...