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



Pop Fizz, Trigger Happy, Whirlwind



Legendary 3 pack



Legendaries and varinats
Punch Pop Fizz

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.