Everytime I look at the store I sigh a little sigh, as I wish there was just more variety, not just in terms of weapon types, but also within weapon classes.
Weapons
Lasers?
Sonic boom gun?
Armor piercing rounds (that ignore or reduce the effect of cover)
FLAMETHROWER
Abilities
Booby trapped square (springs whoever steps onto the square onto a random square up to 10 spaces away)?
Cloning? (think Naruto)
Radio jamming (prevents air raids)
Wet cement (incapacitates a toon, making them lose 1 turn)
Nade catching (throws back any nade landing 1 square away)
etc.etc.