No one special i think it was just someone insignificant, maybe the guy from memphis. Also GO MOHINDER for trying to save peter but peter could have just flown out surely.

What Rock_Smurf_77 said except...
I don't think peter could have flown out!
I think his new ability is same as Rogue from X-men. He can absorb one ability at a time. He lost his super-strength when he touched Tracy!!

Dunno why, but I have a feeling it was Maya (most likely is someone insignificant though) - and I think you could be right sylar_rocks, didn't think of that (not that I know any of the x men anyway) - can't wait for the next one =D

I hope Peter keeps his powers he aborbs =(

i think by injecting himself, Peter just got HIS ability back.

yeah....

ooh! i hope it was maya that flew out! (lolz)

According to Heroes wiki:
"In the last scene when the plane is going down, we can see a masked fugitive who falls off of the plane, yet we can't see who he/she is. However it is probable that the fugitive was a (yet) unknown hero, since Matt, Mohinder, Hiro and Tracy did not wear a mask anymore."

hahaha... hey what if Peter's new power IS the one-touch one-power thing, and he touched Sylar. hmmm... intereszting plots!

Probably someone insignificant although one or two major characters may be injured.
Also to be nit picky its still season 3 just a new volume

"Volumes" And "Seasons" Are the same things, I think.

No there not lol volume three and four are both parts of season 3!! But i dnt think it reli matters!!

Hopefully a guy who can fly!

(please be Tracy, please be Tracy) no idea...

Oh and I think maybe peters power is his normal power, but because he had been drugged and was still recovering it only worked partially and so could only absorb one power at a time by touhing. If this is true then i think it is a good idea otherwhise peter would have absorbed everyones powers causing him to overload.

random. thats what i think.
i pray to god that it couldve been maya :P
but i doubt it.

it was a guy wearing a black suit..meaning none of the convicts as they were all wearing orange.. it was one of the guards then

No but someone also flew out hu was in an orange suit and strapped to a chair, also it wasnt random chels as we were tlkin bout ti earlier :P but it seems tht he can only have one power at a time.

oh well i dont think its anyone significant then.. they didnt even show him in the next eps recap.. they showed the black-clothed guy instead.

i think that it will be a new character that shall be a help to the heroes later, maybe someone who can teleport..as the mask will have come off in midair

It wasn't Maya 'cos she was in contact with "Rebel" after the crash.