To be honest, since so little Pokemon have been revelaed to be in the expanded PokeDex, I honestly have no idea. I'd like to use either Lucario or Metagross though. I haven't used either properly before, and I would really want to. However, I like to have quite a diverse team, so I don't know out of the two I would pick. I'd go with Oshawott/Samurott as my water type though. That's about it at the moment to be honest. XP I kinda want to use Espeon again though, so I can see myself using Lucario- that is, if I don't discover any other cool Pokemon as I play. I'd also like to give Chandelure a go too.
Honestly, I might take a similar approach to Captain Fabio this time around. I honestly can't decide on a team right now, and will probably play the game and choose Pokemon I like and/or I think are strong as I go along. ^^