I would like it if they stuck with European medieval/fantasy weapons when it comes to this new "Rebellion" weapon. From the trailer we saw a spear, a polearm of sorts (axe or scythe) and that whip/grappling chain weapon which fits the theme very well. I'd also like to see the classic broadsword and yes, the guitar was awesome in DMC3 and I would love for it to return, as it was a nice alternative to the guns and rather fun to use, giving Dante some magic attributes as well.
The Kusarigama, Nunchaku, Kali Sticks and the Manriki wouldn't fit Dante in my opinion. They are more fitting Vergil if anyone. Also, the Kali Sticks and the Nunchaku aren't weapons I consider cool (I never used the Cerberus in DMC3). The Beowulf, gauntlets and shinguards, giving him a martial art style is rather cool though and I would like for it to return.