There's another option as well: While you're psyched for RHoD, keep that energy up and start the players at 5th level. Tell them that they get to start at 5th, but have them create characters at the table at the first game, and inject RHoD hooks into the party as they go. You can connect players to the nobles, to the goblins, to the city, nearby settlements, and most of all connect the party to each other, and that way the dice hit the table the game can just take off.