Impact and role in pro scene of new cm hereos

Centaur mid or offlane. He needs that blink. But of these heroes I think he could see the most play. Could be built like a utility alchemist with mek.

Elder Titan I just don't know. As has been previously said his team fight abilities are great so that may be enough to secure him some picks. But that stun can be hard to land or should I say easy to avoid so who knows.

Troll again not sure possibly a situational pick but could be good.

Don't think we'll see much of abbadon. It hasn't taken long for pub players to figure out how to deal with him so I'm sure the pro's will have no trouble. No decent AoE impact, no stuns, I just don't see it. There are far better melee supports that don't get picked that much (Tide, even omni knight) so I don't see why he would be picked above them.

Troll will probably fill a 2 slot as a counter pick, maybe a safe lane carry too, considering his late power...probably the ultimate anti-carry, wouldn't take too long to get him online, bkb, helm, basher, done son.
Elder titan will be picked I can't see him not being picked as an off laner transitioning into a monster team fight hero with a few items

Centaur Warrunner : Good tank, but I guess we will hardly see him on the action, there are better choices.
Troll Warlord: This one we will definitely see, a very strong carrier, even more if used alongside other strong damage dealers.
Abaddon: Great to get kills below towers and debuff with his shield. We might see him on a few trilanes.
Elder Titan: I guess this guy is gonna be the more picked out of all four. He just starts so beautifully. He is without a doubt a great machine to cause some pain in the hands of skilled players.

Centaur Warrunner : He's durable and a good initiator, global ultimates are getting popular, so I believe it's going to be a popular pick. Also, he can stack and pull efficiently, and also clear camps using his Double Edge.

Troll Warlord : My team ran him as a mid laner, and he actually did very good, since he can go melee and ranged at any time, he doesn't have problems last hitting, and also, since he has a slow and a pretty good nuke, he can get some kills. That ultimate is a pain for towers and barracks, too.

Abaddon : He's a huge counter to Naga Siren, he can get you rid of her net, there are few things in the game that can get rid of that, and Aphotic Shield is one of them. Also, he can survive a lot in fights compared to other supports, and also heal efficiently. He can also avoid feeding by denying himself.

Elder Titan : The thing I like the most about this guy is his aura, it's really strong. I can see him picked, that sleep is a pain, but laning him is hard. I can see him working well mid though.

I keep reading these and I can't help but think of Alliance running Troll Warlord with Lone Druid, that ultimate combined with demolish on the bear is rediculous.
I also see elder titan as a solid offlane pick very capable of getting last hits with his spirit and doubling it over as a scout in case anyone's missing or he wants to check on the supports in jungle to prevent himself from dying to any aggression. Not to mention he's more level dependent than farm dependent, I can see a soul ring working wonders and maybe tranquil boots for cheap armor and healing? Maybe a vlads, and following it with more aura items? This dudes a monster, I can't see him being passed over.
Centaur I don't see being picked honestly, Abaddon seems to fill a similar role, just does it better.

Does troll's ult affect the Bear? If so - Hell to the Yes
Can you imagine if it affected all summoned minions (Chens creep, treants etc)

I then proceed to imagine an Earthshaker blinking in and then echo slamming :P

Troll Warlord and Alchemist together for the ultimate dps :p
Throw in a Beastmaster to make it ridiculous :p

Omg lol that's dirty, I was just thinking the troll warlord making sylla an unstoppable pushing machine..troll opens up some craziness

Centaur mid, very unlikely as support since he needs another person to help him land his stomp. It more than likely not be a common pick, but a team who wants can pick it up and do damage, similar to tiny.

Abbadon mid, again unlikely as supprt since his greedy ultimate and needs a bit of items. Probably will not be seen a lot.

Troll hardcarry/mid, he will be a situational pick. He is weak early game with no escape mechanism, and isnt the strongest late game. His stun-lock at 10% compared to 25%. Besides you dont see much stun-lock based strats. I imagine him being picked for the early push, if picked at all.

Tauren Chieften(Elder Titan) mid/support/off lane, very possible that we will see this cow. He fits in the current meta as a support since his stun + ultimate combo can set up many kills, and create awkward positioning for the enemy in team fights.