These are only the items mentioned or displayed somewhere during BotCon this year, according to US assortment release dates. I will update the release listing in the Aus news section later when I get time (this took a few hours to do - damn Botcon is a lot of work ).

Animated
------June-------
Bumblebee - Deluxe Autobot
Lockdown - Deluxe Decepticon
Optimus Prime - Deluxe Autobot
Prowl - Deluxe Autobot
Bulkhead - Voyager Autobot
Megatron - Voyager Decepticon
Starscream - Voyager Decepticon
Optimus Prime Vs Megatron - Voyager 2-pack Auto Vs Decep
------July-------
Autobot Ratchet - Deluxe Autobot
Blackarachnia - Deluxe Decepticon
Optimus Prime - Voyager Autobot
------August-----
Soundwave w/ Laserbeak
Snarl - Deluxe Autobot
Autobot Jazz - Deluxe Autobot
Oilslick - Deluxe Decepticon
Lugnut - Voyager Decepticon
Grimlock - Voyager Autobot
Megatron - Voyager Decepticon
Bulkhead - Voyager Autobot
Rollout Command Optimus Prime - Super Autobot
Bumblebee - Activators Autobot
BUlkhead - Activators Autobot
Starscream - Activators Decepticon
Bumblebee - Bumper Battlers Autobot
Autobot Ratchet - Bumper Battlers Autobot
Optimus Prime - Bumper Battlers Autobot
Cyberspeed Bumblebee - Power Bots Autobot
(Shiftech Optimus Prime Game)
------September------
Sentinel Prime - Deluxe Autobot
Swoop - Deluxe Autobot
Elite Guard Bumblebee - Deluxe Autobot
Ultra Magnus - Ultra Autobot
Lockdown - Activators Decepticon
Autobot Ratchet - Activators Autobot
Optimus Prime - Activators Autobot
Autobot Jazz - Bumper Battlers Autobot
Optimus Prime - Bumbper Battlers Autobot
Optimus Prime Battle Blaster - Autobot
------October-------
Blitwing - Voyager Decepticon
Patrol Bumblebee - Activators Autobot
------unknown/beyond-----
Blurr - Autobot
Swindle - Decepticon
Prowl w/ sidecar armour - Autobot
Lockdown redeco - Deluxe Decepticon
Scrapper - Decepticon
Mixmaster - Decepticon
Skywarp - Voyager Decepticon
Shockwave - Decepticon
Wreck-Gar - Autobot
Arcee - Autobot
Jetfire & Jetstorm - Voyager 2-pack Autobot
Perceptor - Autobot

----------------
Universe
-----August-------
Tankor - Deluxe Decepticon
Prowl - Deluxe Autobot
Sunstreaker - Deluxe Autobot
Autobot Blaster w/ Blockrock - Voyager Autobot
Decepticon Heavyload w/ Drillbit - Voyager Decepticon
Powerglide - Ultra Autobot
Onslaught - Ultra Decepticon
Silverbolt - Ultra Autobot (late august)
Onslaught - Legends Decepticon
Red Alert - Legends Autobot
Starcream - Legends Decepticon
-----September----
Galvatron - Deluxe Decepticon
Acid Storm - Deluxe Decepticon
Decepticon Dropshot - Voyager Decepticon
Autobot Blades - Voyager Autobot
Stormcloud - Ultra Decepticon
Autobot Hound - Legends Autobot
Autobot Jazz - Legends Autobot
Megatron - Legends Decepticon
-----October-----
Ironhide - Deluxe Autobot
Sideswipe - Deluxe Autobot
Silverstreak - Deluxe Autobot
BW TM Megatron Vs Silverbolt - Robot Heroes Pred Vs Max
G1 Kickback Vs Ironhide - Robot Heroes Decep Vs Auto
G1 Thrust Vs Blaster - Robot Heroes Decep Vs Auto
-----unknown/beyond----
Brawn - Legends Autobot
Beachcomber - Legends Autobot
BM Cheetor Vs Tankor - Robot Heroes Max Vs Vehicon
RiD Optimus Vs Megatron - Robot Heroes Auto Vs Decep

--------------------
25th Anniversary
------December 2008-----
Optimus Prime - Autobot
------2009------
Hound w/ Ravage - Deluxe Auto w/ Decep
Cyclonus w/ Nightstick - Deluxe Decepticon
Cheetor - Deluxe Autobot
Hotshot w/ Jolt - Deluxe Autobot

--------------------
Store Exclusives
------May------
Jetfire - Ultra Autobot (TRU)
Jetstorm - Ultra Decepticon (TRU)
-----June------
Deep Space Starscream - Voyager Decepticon (Target)
Inferno - Voyager Autobot (TRU)
Mudflap - Voyager Decepticon (TRU)
-----July------
Nemesis Prime - VOyager Decepticon (SDCC)
Skywarp - Titanium 6inch Decepticon (SDCC)
-----September---
Breakaway - Deluxe Autobot (Walmart)
Crankcase - Deluxe Decepticon (Walmart)
Fracture - Deluxe Decepticon (Walmart)
War Within Grimlock - Titanium 6inch Autobot (TRU)
War Within Prowl - Titanium 6inch Autobot (TRU)
----October-----
Minicon 12-pack (Kmart)
-Ransack Team (Brimstone, Suppressor, Blight)
-Overcast Team (Boltflash, Skyhammer, Cloudraker)
-Safeguard Team (Flatfoot, Makeshift, Heavy Tread)
-Landslide Team (Body Block, Backstop, Knockdown)
----November----
Leadership Team 5-pack (Target)
-Hotspot - Legends Autobot
-Silverbolt - Legends Autobot
-Scattershot - Legends Autobot
-Hungrr - Legends Decepticon
-Razorclaw - Legends Decepticon
Aerial Rivals 5-pack (Target)
-Blades - Legends Autobot
-Skydive (G2) - Legends Autobot
-Air Raid (Cyberjet) - Legends Autobot
-Ramjet - Legends Decepticon
-Thurst - Legends Decepticon
Springer Vs Ratbat - Voyager Auto Vs Deluxe Decep (Target)
Dirge Vs Roadbuster - Voyager Decep Vs Deluxe Auto (Target)
--------------
Marvel Crossovers - August
Ironman
Hulk
Spiderman
Venom