Blue Plastic Tracks

Accessories are always nice!
I could think of:

• additional wagons, coaches, cars (more coaches for JR trains - for example blue coaches for steam trains, additional express coaches for Gordon, James etc, Old Slow Coach without the flags, Emily's coaches, Hong-Mei coaches An An and Yin-Long; Lucy, Jemima and by all means - Beatrice for Skarloey Railway!, and many more...);
  
• additional middle cars with sound;
  
• (dummy) front cars with front hook for commuter trains (it would be nice to make 2 or 3 train combinations);
  
• appropriate road vehicles, industrial and other vehicles that are connected with the specific train (many railway operators have also a company bus-fleet, for example, so it would be nice to have a company bus with a circle of road-pieces as an accessory);
  
• additional faces for Thomas & Friends (a face for Henrietta!);
  
• appropriate Plakids (for example a Saitama Seibu Lions Hockey Player Plakid will go great with my Seibu 9180 L-Train!);
  
• other railroad accessories, stations, other buildings, bridges, tunnels, docks, little lakes, volcanoes (!) and other stuff that goes with the specific train (like Kamakura Buddha with Enoden)...
  

I could go on!

What about accessories like snowploughs?

I would like to see some different 'Cargo' Packs. Some which fit perfectly in the back of a Truck. Maybe even some Tarps that cover a Truck like the one that came with Trackmaster II's Gator but full sized for a Plarail Truck. These could come in 2 or 3 packs of different types of cargo.

Like Mr No, I would like to see some PlaKids packs of general looking people not necessarily tied to a particular train although his suggestion of a Seibu Lions Hockey Baseball Player would really be neat. These could be in packs of maybe 3 - 5 or 10.

For some strange reason...my mind is picturing a Seibu Lions Baseball player PlaKid...is there really one?

Oh, baseball, not hockey, silly me! 
Is there really Seibu Lions player Plakid? I don't know, but it would be nice to have a pack of Lions baseball team plakids as an accesory! Just imagine the whole team waiting for their train here on the platform:

Haha...the whole team...I am on board with that. I do picture one in my head Mr No....I wonder if it may have been a Suzukawa video...for some reason she has popped into my head also but i may be totally irrelevant.

more track switch variety would be nice.  4 tracks bridge support would be nice too.