Which unreleased hero is the most powerful?

I recently noticed how powerful most of the remaining heroes were.

Phoenix has a free aegis, and a powerful nuking support and is fairly tanky (2.9 STR gain) without of course, considering him losing HP.

Legion commander (by level 16) can get a free Demon Edge with 3 ults. His/her snowball potential is unbelievably high.

Earth spirit is... really powerful, from what I hear. He does seem quite powerful from looking at his skills, but I haven't seen him in action so I can't conclude.

Pit lord has an ult that can transfer your team pretty much everywhere. An Io ult for 5 people, and his aura is a great anti carry tool.

Ember spirit (despite having really low stat gain) has a powerful son, a barrier against magic damage, an evolved version of blink dagger (haven't used his ult that much though, not sure how good it is) and a VERY powerful W. It's basically a different version of Omnislash.

Soul keeper can turn a 1v1 fight around and has good carrying potential.

Arc warden is the next level of 2 heroes in 1. It's practically a 6v5, and when he snowballs, 2 heroes do so at once.

Techies, 'nuff said. One of the best pub stompers you can get, and is arguably one of the most unique and powerful heroes in history.

Oracle. His ult is a 9 second Shallow Grave that negates damage for that period and an invisibility that can't be broken by attacks.

Winter wyvern is a great babysitter and his ult works really well against most kind of teams.


So which is it for you guys?