As long as he can get Anka's approval, they can naturally swear allegiance to him, handing over the position of Lord of Battle Valley to him, because they were originally guardians of Anka's legacy, managing Battle Valley on its behalf.
Even if he doesn't inherit Anka's legacy, with his continuous growth and development in Battle Valley, he would eventually force Lord Ilmet to relinquish the title of Lord of Battle Valley. However, it would not be as straightforward as now, and the future path for Lord Ilmet and others would be unpredictable.
Inheriting Anka's legacy has its pros and cons.
The benefits need no further elaboration; besides the aforementioned possibilities, one could also gain more support from the Valley People, as centuries-old legends are deeply rooted in people's hearts, especially among those young individuals who grew up hearing these stories and still harbor fantasies.