Wonder Woman to match this piece by Turner/Steigerwald:
SW Mythos Ahsoka to go with Ventress
(Maybe an actual Clone Wars line?)
A TMNT line for the current IDW/2012 (tricky due to changing artists, but still ...)
A
proper Bruce Timm line!
Very-unlikely-but-would-be-amazing:
A Sana Takeda line either for original work or Monstress
Not-gonna-happen-but-would-be-perfect:
An Akihiko Yoshida line covering his best works (VS, TO, FFXII, N:A)
Generally more art inspired stuff for like JSC, Artgerm, Turner, Timm and such