Alex Dilts, who designed the background scenery for Transformers Animated Season 3, has posted a selection of the backgrounds that he worked on on his blog. One of these backgrounds contains a major spoiler for Transformers Animated Season 3 so be warned before you click on the link!
AnnEEm
Lol..Magnus manages to get himself slagged. Though, before reading all of the comments, I never thought about him offlining so OP could take over. That'd be pretty cool
Autovolt 127
Kickass backgrounds,
i see ultra magnus lying on his deathbed.
aurex
I think that actually *might* be Soundwave's lair. Black's stuff tends to be really gritty and steely looking. Dunno about BA's personal aesthetics, but I don't think she'd chill in a subway pipe – it IS a subway, you can see the tracks in the upper right corner.
Plus, the lighting scheme looks like Soundwave's blue-and-teal dealy his vehicle mode has going on.
Raziel3024
Well, we already knew that UM was gonna end up in pieces.
Razorblaze
Magnus is gonna get f'd up… D:
jbarmadillo
awsome
cool
RodimusZero
I'm actually going out on a limb and speculating that the underground lair belongs to Soundwave. Recall that we last left him in the corner of a sewer with a blinking chest light, so I think it might be logical that he'd use the sewer as his renewed base of operations. Besides, wanting to market and advertise for the movie, I would bet at least a few Washingtons that Soundwave makes a comeback this season.
Railguard
It would be nice to see Blur again.
*Soundwave*
This is what I think of this purpley place, if Blurr comes back. Looking at the chute in transwarped that CJ puts the blurr cube in and at the yellow/black striped doors here, along with more cube shaped things, I think that is where Blurr will go. (only if he does come back)
CH@OS!
My Speculation: The underground lair belongs to Prometheus Black who the Autobots are forced to work with by turning them into organics to fight Soundwave, due to Soundwave’s abilities to control other machines.
Zaraxion1021
They're gonna kill off Ultra Magnus… I ♥ these backgrounds.
dark69
ohh this is getting good
KING KONVOY
I think the five beds is for the creation of a combiner
SPLIT LIP
I wouldn't be surprised, we've seen Energon in this show before.
caitlindevi
Thats exactly what i was just thinking
Nutcrusher
Virtual pretenders?!
And are those… energon cubes in the pink picture?
Scantron
Speculation: The underground lair belongs to Soundwave. There's been a rumor that Season 3 contains a two-part episode where Soundwave traps the Autobots in a virtual reality world where they are given human avatars; the five "beds" could be where Soundwave places the Autobot's bodies while they're hooked into the VR world. Also, the lair appears to be in a sewer, or underground pipe system, which was the last place we saw Soundwave.
KING KONVOY
Magnus…NOOOOOOOOOOOOOOOO! Why do they have to kill to promote prime? Do you think it Rodimus' fault or maybe BB? I know it's sentinel's fault. They made sentinel a hated character so it's easy to blame him. They've also made Magnus a questionable leader because his seemingly harsh and cold decisions. Magnus is a great leader but every leader has problems with subordinates that don't listen.
Grimwing
Magnus..on a operating table. Clearly related to the previous pic with the huge damage. I like how the backpack piece and his hand are linked into him still.
Could this be the location for the passing of the matrix? It seems familiar.
Anyway, I think the jungle is actually the most unique background here.
It looks prehistoric. Dinobot Island Time Travel Homage?