User blog comment:KidLego09/No Justin For RR/@comment-5899967-20150122114105/@comment-5899967-20150122130719

People said Brian was voicing one of his older characters but I haven't found that post, but he was asked if he was playing Harold/Sam and said "we'll see" "time will tell", smiles, he favorited one of these tweets, usually when the actors hint at these things it's true, they wouldn't create hype and hopes for nothing. And Julie said we'll get a mix of generations, so Sam is my guess... even though I don't like him, Harold is much better.

And I don't believe there's a fourth veteran, 95% of the cast is new.