Like I said in other recent thread expressing how excited I am when I first heard of ROK 2.0 ..
I'll speculate what would happen in ROK 2.0 I call it ROK 2.0 cuz Ruins of Kunark is also ROK so is Rise of Kunark. 
1. Level cap stays at 70
2. Guild level cap increases to 70
3. Few new secondary tradeskills
4. New claymore series style like Sword of Destiny for EOF
5. New playable evil city, Cabilis
6. New playable evil race: Sarnak OR Shissar who runs Cabilis that Iksars abandoned.
7. New Diety OR Racial AA with 50 AA cap to increase cap from 100 to 150..
8. New HQS such as Fungi Tunic, Circlet of Shadow, etc
9. New Epic 1.0?
10. 1-70 content just like EOF and same or maybe little bigger size than EOF.
11. More dieties and maybe more quests are added to support existing and new dieties
12. Guild house (WE REALLY NEED THIS). Obtainable at guild lvl 70 at cost of terms of million of SPs and money. It can be built on destinated spots on lands. Unique houses just like cloak design concept does..
I guess That's all off my head..