Chatting to Paragon Creative Director yesterday - weirdly - I asked him whether or not the existing Heroes (and future ones) would be getting voice lines, similar to Overwatch or Heroes of the Storm and funnily enough he confirmed they would. Fast forward to a clever data-miner over on Reddit and it looks like they're already in. Take a look below. 

Feng Meow

• Know your opponent as you would a friend. They have much to teach.
• Watch and you may remember. Involve yourself to understand.
• Every hunter should know what it means to be prey.
• I enjoy the winds of life! Pipe, song, and spear.
• Invincibility in defense! Victory in attack!

Gadget

• Okay dude, it's real simple... 
• This place could use a woman's touch. <Bot beeps happily>
• Happiness is a warm hover-engine.
• Hey, what do I know? I'm just an aerospace engineer.
• Never trust anything you can't take apart.
• <Sigh> Suck it up. Read the instructions. Knowledge is power. 
• You won't believe what you can do until you get to work.
• Great! You got an idea! Go make it happen.
• Engineers and Mechanics... Know the difference.

Grux

• Blood the soil, see victory grow.
• I see no warriors! Only cattle...
• Give yourself to WAR!
• Come! Test your flesh!
• To the crunch of bone under mighty hoof!
• Conquest is the right of the strong!
• Do what you will! This is the law!
• In what, do you believe?
• Tell me! Is your homeland rich? Your tribe...strong?

Howitzer

• What're you lookin' at, runt?
• Say hello to my metal friend.
• Ain't nothin' that can't be solved by a well-placed impact crater.
• You look at me and see some kinda psycho, bomb-crazy critter...Well, ya ain't wrong...
• Time for some junkyard justice!
• All dressed up, with warheads to throw!
• They don't make 'em like me no more! No sir?<brittle laugh> I'm sure?
• Got a powerful cravin' for detonation!

Kallari

• It'll be quick...like falling asleep.
• You're mine for now. But in the end...we are all free.
• Truth has always lived in the shadows...
• Before you slip away...please...tell me what you see.
• Pain is vengeance. Death is mercy.
• If you hear a whisper...it's too late.
• It's amusing what we think we know...
• Life is just a cycle between birth and oblivion. (Impuredeath again)

Muriel

• In all things, choose love. (Hey Janelle)
• Who am I? Who are you? There are no easy answers.
• This is your only warning: Do not touch my family.
• I am far more than you see. We all are.
• Compassion is the only way out.
• Give all to another...and save yourself.

Murdock

• Good. Bad. Don't amount to a spent cartridge once the dyin' starts.
• Play to win. Shoot to kill.
• You got the right to remain silent. Anything you say can get you vaporized.
• Ever seen what this puppy does to organics? POP! Like feedin' a flashbang to a cargo-rat.
• Thought about getting married, but Boomer here belongs to the Corps.
• Do what you love... Never work a day in your life.
• Killing isn't justice...it's a job description.
• Xi4 is a legendary fruit.

Rampage

• Fight for life. On-ly way.
• Unda-stand, I. <Croak> You...unda-stand?
• See more, I...<Grunt> You not see...
• <Growl> Am strong..not..blind.
• Hate?<Growl> Kill inside.
• No chain...no lashh. I go.
• How I find peace?! <Panting Growl> Where?!
• Do not..get..in way..
• Enter Jungle..I see. Make sound..I hear.
• <ROAR> Dis! <Grunt> My land!

Gideon

• What do any of you know about true power?
• The Cosmos does not obey laws. Only the Will.
• Cling to humanity, fail to evolve.
• Few see the horizon and dare to reach beyond.
• Every true choice, I have made alone.
• Of what use is Fear?
• The pillars of legend sit atop foundations of bold men.

Sparrow

• Refinement...now that's a matter of perspective.
• Pulled too tight, the string snaps. Too loose and it won't draw. Seek the middle tension.
• "Aim before you shoot"... A troublesome habit to break. (sick burn m8)
• When in doubt, remember the Trinity: Nock. Draw. Loose.
• Live as the arrow flies. The wind will do as it pleases.
• Immortals... Such time wasted on living forever, and so little invested in life.
• Instincts are good for more than just survival...
• Throw yourself to the wolves! You're far more capable than you realize.

Steel

• My name is Steel.
• Stand behind me! This is what I do.
• Heroes fight for revolution...I am their shield.
• Now is our time.
• Face death with courage. Live in hope.
• HONOR! GLORY! DEVOTION!
• Never doubt where hope can take you.

Dekker

• There is no better way than to see for yourself!
• Somewhere, something incredible is waiting to be Scienced!
• Interstellar combat? <blow raspberry> Please... It's the inevitable heat-death of the universe I worry about.
• <sigh> The search for intelligent life continues...
• Look, there's a lot of stuff out there! Like "panic-attack" a lot...
• When I'm out there...it's weird...even when I'm by myself, I never really feel alone.
• Come on, dummy! Use your imagination!
• Open your eyes! I guarantee you, there's something you haven't seen before. (Epic Games when hiding new data in the client lmao)
• Up there! Those are stars! Other suns! Dunno know about you, but I'd like to know what's spinnin' around 'em.

Twinblast

• Hey, take it easy on the paint, I just got detailed...
• Look man, I'd give you a hug, but ya know...gun hands! (savage)
• Play nice, and I'll tell ya where I keep my ammo?
• Aright Longshots! Open fire!
• Been fighting since I could make a fist.. <sigh> Maybe it's time to make it count.
• Okay! Yeah! So I don't have a plan, but...it's a hell of a work-in-progress!
• The second you stop being afraid... that's freedom.