Some details on new content being added to this version and teasing a new monster:
- send other players flying onto the back of monsters
- this is being added in due to the lack of ledges in some areas
- G-rank Guild Quests being added
- G-rank will introduce tougher challenges and stronger monster
- Garara Ajara, Genel Serutas, Kechawacha, Tetsukabura, Zaboazagill and others will be getting new sub-species
- these sub-species will give them different characteristics and attacks
- Old Desert area will be making a return
- you'll find Cephadrome and Daimyo Hermitaur here
- new monster teased as well
“It has more of a slender body-type when compared with all the other monsters we’ve had up until now, and the distinct gap it has between its fingers will also be another focus. I’ll leave the rest up to your imagination for the time being.” - producer Ryozo Tsujimoto
Source:
http://www.gonintendo.com/s/227072-monster-hunter-4-ultimate-details-on-new-content-new-monster-teased