Rowlf did have a line or two in the Christmas movie. But Bill's Rowlf sounded like Bobo the Bear, another one of Bill's characters. Hopefully Barretta has been doing his homework in making his Rowlf's voice sound like Henson's Rowlf.
As for the Electric Mayhem, it's great they'll be in the movie more. I'm curious as to how Dr. Teeth is going to sound like now that Barretta is doing the character. That moves John Kennedy from doing Teeths voice into doing Floyds voice now that Jerry Nelson is retired. I hope Zoot speaks and I hope to see Lips and have him say a few lines.
ryan