The reguler sentury will be replaced with a upgradeable sentury with a shield. in other words it will just be a defult sentury but with a shield but no rockets at level 3 but will have a extra minigun.

The mini sentury will be replaced into the shield projecter seen in the picture and will have the largest and strongest shield but lower hp.

The dispenser will be replaced with the bear trap.

Shield states:
+the shield can 1000 damage before disapearing
(1300 level 3)
(2000 mini)
+ally attacks can pass though the force field but the enemys' can't
-enemys and allys can pass though the sheild

bear trap
+when an enemy steps onto the trap they can't move for 3 seconds and will cause bleeding
+enemy spys standing on it will not be able to cloak
-has 75 hp
-is visible