So we have:
1-Blitzwings Helmet
2-Lugnuts arm/Gun
3-The Head of Waspinator
4-Energon on a stick
5-Laserbeak
6-Porter C. Grimlockfood
7-Red Alerts arm/gun
8-A Rat
9-A Robot
10-Something that looks like a Robots Leg
11-A Person with a Bandana on his head
12-A Baby
13-Machinery/Weapons
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Blitzwings head and Lugnuts arm hopefully means that those 2 are aliv and back in business. I hope so as Blitzwing was a great character.
Laserbeak could mean the revival of Soundwave, who although appeared in 1 episode was still a good character, and if he does come back i hope he stays for longer this time.
Waspinators head could mean everyones favourite punching bag is back (will Spider-bot go steady with Waspiantor?)
Red alerts arm may mean he/she is in Season 3
The Rat could be Rattrap, or was just there to confuse us.
Porter C. Grimlockfood is also back, lets hope Grimlock finishes the job this time.
The Stick of purple stuff on a stick might have something to do with Sari, or just be there for confusion
The person with the Bandana looks alot like Cancer (Squeezeplay) which may also link to Browning joining the Decepticons
The Leg-like object does look like it is infected with Cosmic rust which may result in the disease arriving in Season 3
The Machinery/Weapons could be something related to a new Transformer
It looks good to me
, Cant wait to see Season 3 of TFA.