Capcom stated recently that they were interested in bring fromteir G to the west.. They announced this along with their announcement of MH4.. however. it was stated as something they "WANT" to do not something they were commited into doing.
"The letter “G” in the title implies it’s compatible with a wide range of platforms, including PlayStation3, Wii U, Xbox 360, and PC. We’re also planning to extend this support to PlayStation Vita. The reason why we have increased our support for so many hardware platforms is because we have our sights set on distributing services for this game in the future outside Japan. We simply can’t release a game as it is, but need to adapt all the necessary services to the unique characteristics of each region. In preparation for that, we’ve broadened our scope and started launching individual titles across multiple hardware platforms." Capcom Japan
Also.. just remember so far in ever g/u game that has been released to date they have added a new weapon or put back weapons that have been removed previously.. currently MH4 has all the weapons the Monster Hunter has EXCEPT for the tonfas... which means for Capcom to remain with their pattern they would have to add the tonfas to MH4U... Also Capcom stated that 4U would have more jumping and interaction over 4.. look at how the tonfas work even in the video above.. Looks to me they would fit in great in 4U.. just my thoughts though.