A ghost type... I think it should have front legs, but not back legs. That'd be cool. Phanteon or Specteon would be cool for names.
A bug type... would actually be cute... in my mind, at least! Butterfly wings and cute boingy antennea! And little hooks on its paws so it can climb stuff ^^ Inseon or Artheon. (arthropod)
Flying... covered in feathers and big wings! ^^ Alteon or Skyeon. >_> Or Ozeon.
Dragon... furry dragon! With dragon wings and a furry spade tail! ^^ Ryueon, or Drakeon.
Steel... I think... silver, with two large spikes on its back and its head. Its tail is stiff and sharp, like Absol's. Titeon, Silveon, Ireon.
I know there's more, but those are the ones I'm excited about. I wonder... what they will really be called and what they will look like. *can't contain excitement*
So. Yeah. Whoo. I think they'll continue to do an Eeveelution for each type until either Pokemon goes out (if you know what I mean) or they do each type.
I hope it's the second one. ._.