Yep.
Evan Lahti from PC Gamer e-mailed the guys behind it and got some confirmation. The MechWarrior license holders are indeed involved. Here's evidence.
Can't wait for pretty mech graphics with explosions and stuff.

My beloved game... New MW would be awasome. I'm still playing MW 4 & addons from time to time...

Just saw this on Joystiq. This makes me a happy boy.
STOMP STOMP STOMP STOMP.

Hopefully it's worth the long wait (they haven't dumbed it down).

time to play 3 again.

Saw this on the escapist.
Very happy.
Can't wait!

YES! YES! A THOUSAND TIMES... YEEESSSSS!
Sorry, this news gets me a little excited.

I just picked up a new copy of Mech Warrior 4 at Carrefour in Istanbul for Only....1.50 USD
Haha!
I win! .................at shopping!

About damn time a new MechWarrior came out!
Big robots will be BIG...again!!! WOOT!

I'll just wait for the new MechCommander... :(

That's fine since I am really done playing MW 4: Mercs. Hopefully they make it more sim like and less arcadey like 4.

Awesome news; I'm hoping it has a proper single-player campaign.

Load me up with some ER PPCs. Oh, baby, yes.
Want.
Want NOW.

Hmm, a long as its a REAL mechwarrior game and not some shitty arcade 3rd person shooter with robots instead of men

I can just quote. MW4 was already a dumbed down MW3 but it was still a good MW game, I hope they will keep at least the MW4 standards