■Merlin will somehow be stripped of his powers (possibly temporarily). This has been confirmed.
■Lancelot has a major role in Revival of the Witch. This has been confirmed.
■The Arther/Gwen/Lancelot love triangle will be played out majorly. This has been confirmed .
■Lancelot will be declared dead. This has been confirmed.
■There will be more stories about Uther's past. This has been confirmed.
■Arthur and Gwen get engaged. This has been confirmed as the two will get married some time in Series 4.
■Gwen will know about Merlin's secret. This has been confirmed.
■Morgana will find out Merlin's secret and injure him, to prevent Merlin protecting Arthur and the King. This has been confirmed.
■Agravaine will be the enemy of the future queen. It is said that there will be many Gwen/Agravaine scenes.
■Cornelius Sigan's soul will possess another person. There is a Possibility.
■Lancelot is not the real Lancelot. This possibly has been confirmed. It is more likely that Lancelot is more different to the one in the legend. Not cloned or enchanted.
■Mordred and Arthur will meet again and Arthur will see a different side to him