OK, let's take it beyond army builders then some...
-Super Articulated Jango Fett Vs. Super Articulated Mace Windu... OOOOOoooo this one could kick major ass if it had every feature to the Jango we could possibly want.
-Super Articulated Luke Jedi Vs. Super Articulated Boba Fett... Another cool one with major possibilities, even if Luke's just done in a decent figure now.
-Super Articulated Darth Vader Vs. Super Articulated Bespin Luke.
-Super Articulated Vader (hell, even repack it) Vs. Super Articulated Jedi Luke.
-Super Articulated Vader (ANH style) Vs. Super Articulated Obi-Wan.
-Super Articulated Obi-Wan Vs. Super Articulated Zam Wessel.
-Super Articulated Obi-Wan Vs. Super Articulated Darth Maul.
-Super Articulated Qui-Gon Vs. Super Articulated Darth Maul (Tatooine Figures).
-Super Articulated Qui-Gon Vs. Super Articulated Battledroid (white).
-Super Articulated Yoda Vs. Super Articulated Dooku.
-Super Articulated Dagobah Luke Vs. Super Articualted Dagobah Yoda (It was sort of a "Vs." thing, right?
-Super Articulated Rebel Officer (Brown Uniforms) Vs. Super Articulated Imperial Officer (Black Uniforms).
-Super Articulated Imp. Royal Guard Vs. Super Articulated Rebel Honor Guard.
-Super Articulated Imperial Tech Vs. Super Articulated Rebel Tech.
-Super Articulated Admiral Ackbar Vs. Super Articulated Admiral Piett.
-Super Articulated Grand Moff Tarkin Vs. Super Articulated ANH Leia.
-Super Articulated Wicket Vs. Super Articulated Leia Endor.
-Super Articulated Han Endor Vs. Super Articulated Imperial Officer.
Or, we could even include a Scout or Stormtrooper with SA main characters in many cases, like an ANH Stormtrooper with an ANH Han or Chewie... You get ultimate main characters and army builders all in one set.
This idea really could spark a whole new life to Star Wars from a play standpoint... Giving insentive to the kiddies to get back into it for sure. Play off the success of the G.I. Joe 2-packs that really took off. It would be great I think.