G1-Neume revealed some news about the next Sword of the New World update in Next Major Update Details forum topic.
The few tit-bits he revealed so far are mostly features of v3.5, so I will link them to existing feature articles in sGE below. Costumes are linked to the respective screenshots.
- Summon Friend Scroll available in Feso Shop for 10k feso each. See Scroll of Destiny.
- Jewels can be upgraded. See Eeny Meeny Miny Moe!.
- Reduction of maximum Upgrade Accelerators needed. See sGE v3.5 Patch Notes.
- Alejandro can wear metal armors. See sGE v3.5 Patch Notes.
- New premium dungeon - Sacred Caebolan. See Sacred Chaos Requiem.
- Skill points can be reset. See Skill Restoration.
- New colony war system. See New Colony War.
- New necklaces available n Errac. See Craft Your Own Necklace.
- New costumes include Torosmata Ren (m/sco), Slendor Reaco (m/wiz), Clarcana (sco), Shaggy Bobcut (f/sco), etc.
- New back costumes include Crystal Wings (temporary, ATK +10%, ATK Speed +10%, HP Absorb 5%, Undead/Golem ATK +15%).
- Premium and gold packs will be removed from SotNW Marketplace to be replaced by 3 new gold packages. Target/GMG Cards are unaffected.
More updates on stances and skills here.
In addition, Portmanteau VI boxes will include Sith.2 I will assume this means Sith will be replacing Panpan.