I think if they used new ends for those coaches without the corridor and a nice little repaint, those coaches would work splendidly!

Henrietta is definitely a welcome addition with Toby coming out!! I don't really buy the Christmas sets, but I agree with Terrance that using Henriettas mould as a Christmas coach is unique. Also, I think Hannah would do pretty good if it's a limited run. The tar wagons are great for fans of both the cgi and model series.

I think the red 4 wheeled coaches would be a welcome addition for both Thomas and British railway modelers like myself. James is often associated with these coaches and all they need is a repaint to be on prototypical British railway sets. While I'm fine with waiting, I think Gordon is another good choice for Bachmann to make in n scale, if they're willing to put in the effort. I'd rather him in proper scale and accurate look than have him out next year. He's always been a central character like Thomas, Percy, and James so I bet he's be really popular (though bias as he's one of my three favorites). I dread them making those super thin cgi express coaches though. They were some of the worst cgi models IMO. I'm even thinking of modifying Dapol maunsell coaches to be like the model series accurate express coaches, though maybe I should wait first to see if they'd for one use the model series basis. Finally, I'd suggest Percys mail coaches since Percy is already out.

On a slightly separate topic, does anyone mod their n scale Thomas models to be more like the model series?