Definitely yes. He’s been shown to be crazy powerful, despite that being the first time he fought with a sword, and the King also predicted that he would be a great ruler. Most of the lore that’s been incorporated into Sins is part of Arthurian legend, and a lot of the character’s names are the names of kinghts from King Arthur’s court, so my guess is that eventually they’ll all end up going to his kingdom, and serving under him after the whole thing with Britannia. Merlin is also still with Arthur, and I’m sure the knights will reunite at some point so I think it’s inevitable that he’ll be coming back, and be a large character as well. Actually I’m half expecting a bit of a time skip after this arc, maybe to when britannia is back on it’s feet? And then we’ll se Arthur more grown up and way more powerfull than he already was.