SDCC is having a preview night for the media and Hasbro has shown off a bunch of upcoming Transformers.
In addition to more shots of the all-mighty Unicron with have the first Siege Micromaster Combiner Team revealed (Direct Hit and Power Punch), More Siege Micromaster Cassettes with Rumble/Frenzy and Ratbat, The 10 Micromaster box set that's been rumoured for some time, IDW Rung Siege Battlemaster, Bot Bots Series 3, A G1 Soundwave and Cassettes reissue, Cyberverse, Rescue Bots, trading cards and licensed 3rd party.
Siebertron's main gallery
Unicron - Seibertron
Astrotrain - Seibertron
Micromasters - Seibertron
3A Bee Movie figures - Seibertron
3A Nemesis Prime - Seibertron
Flame Toys - Seibertron
3A - TFW
Flame Toys - TFW
Cyberverse, Bot Bot, Rescue Bots - TFW
Studio Series and MPM Megatron - TFW
WFC Siege - TFW
Unicron - TFW
Toy accuarate Siege Reflector, Siege Soundblaster and Bluestreak - Seibertron
SDCC Transformers Product Panel - TFW
SDCC Transformers Product Panel - Seibertron
Walmart exclusive 35 Aniversary Siege repaints - Seibertron
Combiner Cassettes reissue - Hasbro Pulse Thanks Paulbot
Official images for Cassettes, Galactic Man, Reflector, Amazon Exclusives and Lancer - Seibertron
Walmart 35th Anniversary exclusives - TFW
Combiner Cassettes Gurafi and Noizu reissue - TFW
Updated SDCC display cabinets for post panel reveals - TFW
10 pack Micromasters proper reveal - Seibertron
Updated galleries - Seibertron
MPM Megatron and more Siege galleries - Seibertron
Cyberverse, Bot Bots and Rescue Bots - Seibertron
Pop Culture Shock G1 Megatron - TFW
SDCC coverage links - BWTF
Seibertron list of where to order all the new Siege Transformers