The Identical Twins (Engineer Sentry)
Model: I guess a slightly smaller version of the regular sentry

+Can place 2 sentries
+When both sentries are together in range, range will increase 25% more and firing speed will be increased by 30%
-Sentry damage is reduced by 50% when not near the other sentry
-Cannot upgrade sentries

The Soul Taker (Spy Melee)
Model: A black and glowing mint color attached to the Black Rose

+/- On kill, turns victim to ice with the spooky ghost unusual effect
+Silent killer
+On kill, gains 1 soul (Eyelander head effect) Maximum Souls: 15
-50 Health on wearer

The Blast Hammer (Heavy Melee)
Model: A hammer with one sid ebeing a little sharp triangle and the other being a giant rectangle.

+Every 2nd hit, will critical hit and be explosive
+50% Damage Bonus
-The explosion will damage you too
-50% Slower Swing Speed
-25% slower weapon switch while active

The Science Boots (Scout Secondary)
Model: Technological high-tech boots and whenever your jump you make an cowmangler explosion below you (Does do damage) and whenever you run, you leave a laser trail.

Alt-Fire: Scout can change his boots to the jump boots and speed boots.

Speed Boots
+50% speed boost
-25% lower jump height

Jump Boots
+50% Jump Height
-25% slower movement speed

The Headsplicer
Model: Something similar to the eyelander

+On hit, demo increases his melee range, swing speed, and damage by 25% and resets every head.
+50% damage bonus
+Restore all health on kill
-Cannot switch weapons until kill
-50 HP on wearer

The Eternal Nightmare (Medi-Gun/Gun?)
Model: Kritzkrieg model with purple and black

+Placing your medi-beam on an enemy will give them blindness, bleeding, and Boo-ed as long as the beam is on them and it will also charge up your ubercharge.
+30% Ubercharge rate
+Alt-fire: Summon a friendly monoculous
+Killing an enemy will make them dissapear and spawm a skeleton (Pretty cool idea by you guys)
-60% less healing rate
-100% less overheal rate

Results: It may seem not as medic-y as the other medi-guns but you can still heal but it'll be most of the time that your helping your teammate out taking out an enemy instead of standing there. So, I would say its good for battle-medic.

The Glitched Sapper (Sapper)
Model: A stock sapper with a bit of matrix look to it

+When on sentry, turns the red sentry to blue for 5 seconds. Effect will reset after the sapper is gone. Also, it works on robots.
-15% damage vulnerability while active
-Cannot use disguise kit while active

Time Bomb Knife (Spy Melee)
Model: A stock knife with a little bomb attacked to the side

+Upon backstab, spy loses his knife and the player that got backstab will have 5 seconds to react and kill the spy before the bomb blows up. Killing the spy will disable the bomb. The Time Bomb will be an instant kill explosive with a 50% sticky bomb blast radius.
-35% damage vulnerability while active

Combo Fighting Fists (Heavy Fists)
Model: Could just be stock fists (You can add the flames on it or somethin idk...)

+On kill, heavy will teleport to the next player with a speed boost. If the heavy kills the next player, he earns a mini-crit boost. On the 3rd kill he will gain crits. On the 4th kill, heavy will have a super explosive punch that has a 100% Blast Radius explosion killing players around him and the kills reset.
+20% movement speed boost
+50 HP on kill
+50% faster attack speed
-45% Damage Vulnerability
-Cannot jump while active

The Wrong Medicine (Medic Melee)
Model: Syringe Needle (Team Colored)

+On hit, gives the enemy certain side affect
+Side affects can be uber, bleeding, etc.
-Rechargeable weapon
-100% damage penalty