Expanding on my previous post, it makes sense to me if Grover were to be packed with the letter G and Mr. Johnson by default with the letter N, but that's if they're individual releases. If they're a 2-pack then it's a toss-up that's just as valid whichever way. If Sherlock does come with the letter X, then Frazzle would come with the letter U... But shouldn't Ethel Mermaid be the figure with a letter U? Yes, I know that's delving into the obscure character category, but I ask which would be more obscure, her or Professor Hastings.
If Herry is to come with a Muppet letter, it'd make sense for it to be the letter H, but I could be wrong.
As for

, he's packed with so much, would he come with a Muppet letter? It'd make sense for it to be the letter O, but again, I'm not sure on that one.
As far as the release schedule, the only ones not cited in terms of when to be expected are Grover and Mr. Johnson. Still great news today, I'm extremely happy and hope the line keeps going.