My wave 1 speculations:
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Giants:
Tree Rex
Bouncer
Crusher
Swarm
(Having 4 giants on wave one would leave them with 4 giants left, to release in other waves.)
New Characters
Pop Fizz
Fright Rider
Chill
Jet-Vac
Shroomboom
(leaving them with Hot Dog, Flashwing, And Sprocket.)
Lightcores
Prism Break
Eruptor
Jet-Vac
Shroomboom
(Leaving them 4 to release later!)
Now the S2s. with reasons listed next to them.
Sonic Boom (TRU)
Zook (TRU)
Drobot (TRU)
Eruptor (TRU)
Prism Break (TRU)
Terrafin (TRU)
Hex (TRU)
Ignitor (L 3 Pack, so why not reg?)
Slam Bam (L 3 Pack, so why not reg?)
Trigger Happy (being shown in the Game Features trailer)
Whirlwind (In a 3 pack shot with Trigg)
Flameslinger (Gold variant)
Cynder (starter kits and GITD)
Chop Chop (Battle pack)
Double Trouble (Amazon Leak and we should have at least 1 magic repose)
3 packs
Chill, Zook Ignitor
(Amazon leak)
Pop Fizz, Trigger Happy, Whirlwind
(Amazon leak and an image)
Legendary 3 pack
(On the TRU website)
Legendaries and varinats
Punch Pop Fizz
(In the 3ds kit)
L-Bouncer
L-Ignitor
L-Slam Bam
L-Jet Vac
Granite Crusher (Give us his smiley dark!)
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That's my speculations. None of this is real.