je faisais mon petit tour sur les forum anglophone de DMC et voici ce que j´y ai trouvé.
Official statement from capcom...demo Early 2008!
here´s some more cool news!
DEMO FOR CAPCOM®´S DEVIL MAY CRY® 4 COMING TO PLAYSTATION®3 SYSTEM AND XBOX LIVE® ONLINE SERVICES EARLY 2008
Gamers Will Have the Opportunity to Experience the Power of the "Devil Bringer" Before Purchasing the Game
Capcom®, a leading worldwide developer and publisher of video games, today confirmed that owners of Sony Computer Entertainment´s PLAYSTATION®3 computer entertainment system and the Xbox 360® video game and entertainment system from Microsoft will be able to experience Devil May Cry® 4 early, thanks to the release of a playable demo. A free downloadable demo of the game will be available on the PLAYSTATION®Store and Xbox LIVE® Marketplace in early 2008. Devil May Cry 4 has been rated M for Mature by the Entertainment Software Ratings Board (ESRB).
The demo introduces gamers to the gothic-inspired supernatural world of Devil May Cry 4, new protagonist Nero and the awesome power of his Devil Bringer. The demo consists of a sampling of sections from the full game, chosen to showcase Devil May Cry 4´s varied locales and allows gamers to familiarize themselves with Nero´s unique abilities. Players will receive instruction on the various new actions that the Devil Bringer bestows, such as the ability to slam creatures to the ground, cover great distances in a single bound or even grab enemies while on the ground or in the air and pull them towards Nero to continue the attack combo. The Exceed system allows Nero to "rev up" his sword as if it were a motorcycle throttle and unleash devastating attacks. Players will need to master all these techniques before the end of demo showdown with the mighty Berial.
Fully demonstrating the power of the next generation of consoles, the Devil May Cry 4 demo brings to life the coastal city of Fortuna and its surroundings, such as the port and snow-capped mountain ranges in exquisite detail. Devil May Cry 4 delivers its intense action at a constant 60 frames per second at 720P resolution on HD monitors, ensuring seamless and breathtaking gameplay all in stunning high definition.
traduc en gros:
les joueurs auront l´opportunité de tester le pouvoir du devilbringer avant d´avoir le jeu.
capcom un leader mondial dans le developpement et la publication de jeu vidéo, a comfirmé qu´une demo sortirai sur le playstore et le xbox live début (proche) 2008. enfin bon ça on savait.........
la ça devient interressant:
la demo vous présente nero et son devilbringer. elle est composé de plusieurs niveau venant du jeu "complet" histoire de "metre en vitrine" les différent decors du jeu et de vous familiariser avec les aptitudes a nero. vous aurez un tutoriel pour vous aprendre les manip (a la manière des anciens DMC) ect....
il y aura donc la plupart des capacité que l´on a vue, (chopé et eclater au sol, sauter de grands obstacle, le exceed systeme)
et cela se terminera sur le bon vieux berial!
en gros on aura la toute première demo qui a été donné à la presse (mais elle refletera plus la qualité actuel du titre) et au tout début 2008.
ces infos sont sont sur a 100% 
perso j´aurai bien voulu avoir dante avec lucifer en plus.