No, it actually was an honest question, but I think Greg answered it nicely in his post (thanks). I do recall there being some modification of the Azog character but I didn't pick up on how Bolg related to that. I won't even get into Fimbul and Yazneg.
Ah, I didn't see Greg's earlier answer too... but yep, that's what's been speculated. I think once the PJ decided that he needed a more intimidating Azog and went the CGI route then the design for Bolg (his son) needed to change as well. Also in the original two part story, Azog wasn't even going to be the main Orc bad guy - this was supposed to be Bolg. If fact, originally Bolg was the orc stationed at Dol Guldor with the "Legions"... this all go turned around when PJ decided to expand to 3 movies and inserted Azog as the main baddy. So Azog ends up in Dul Guldor and Bolg is sent out to do the dirty work.
Since Azog was added about 5 weeks before the movie was released (or so the says the internet speculation) then all the merchandisers were left with a toy (old Bolg) that was actually only added in a flashback scene to the Battle of Azanulbizar. Look closely and you can see young Dwalin killing this character.
There was also a change to the Smaug design... originally he was a four legged / two winged dragon and then was later changed to be the "integrated" wing/leg design we have now. I believe this even changed from the Theatrical release of AUJ and the Extended Edition DVD/Blu release.