... because everyone else in the Mecha skin line does it:
becomes a jet (recall animation)
becomes a drill (recall animation)
becomes a locomotive (ult animation)
becomes a batmobile (recall animation)
I think 
being the only one left out is a huge inconsistency.
Ralanr4 votesWould be awesome, but it’s too much animation work.
I want a helicopter.
Velzard of Koz2 votesLol, I just meant to ask what vehicle he'd be. Helicopter would make sense. Although why not save it for Mecha Jax :D
LordGeovanni2 votesThat would be implying that jax needs an upgraded form
GranPapaCorn4 votesMaybe a dune buggy?
Grimm Howl4 votesHe's just a bugged Mecha.
Ozzie Storm3 votesi suggest a motorbike
CrazyBigfoot282 votesIsnt their like a sound of a jet everytime kha zix hops around with his evolved e
Ionian Vulpix1 votesArcade Sona needs one too.
XIII Vanitas1 votesArcade Sona needs a new splash art as well!
Moonboy651 votesSona is on the list for splash updates
Variks the Loyal1 votesHelicopterrrrrr his wings and claws can turn into the blades.
Asudurga1 votesStealth Bomber! His claws becomes the wings alongside his regular wings, his head snugly becomes the front etc.
Nilok1 votesHow about an insect like the Insecticons.
...What? There were more than just cars and planes in G1.