Read the PM first!
If you decide to remake all of the userbars, you'll also need to remake the staff userbars: Leader (Articuno), Co-Leader (Darkrai, unless TMC wants something else), Moderator (Regice), Main Artist (whatever the heck you want), War Captain (Black Kyurem), War Team (Weavile), and War Sub (Substitute or Sneasel).
If you can make .gif images, that would be awesome. If you can't, they aren't needed.
TMC and I are also working on several things. We may or may not need art for it. Be prepared to make more stuff we need more (it won't be much).