I think a combo of JJ1, 2, and 3D would be nice, as in JJ3D's Customisability, JJ2's Powerups -- except with not just one powerup per weapon, it could be like a Talent Tree for different weapons(Ratchet and Clank: Tools of Destruction-style) -- and its large list of weapons, and JJ1's Morph System(Different weapons for different Animals). Also, much more Guns and Ammo would be nice too. Like Plasma Ammo, or a Minigun, or Grenades! The possibilities are(Almost) endless!