Since this is a culinary manga, the next logical step is making it international, we haven't seen many cuisines from around the world. The manga has only focused in Asian (Japan, China and India mainly) and European cuisine. we're missing, latin american, african, middle eastern, cuisines as well as not mainstream European, asian, cuisines (Where're my Thai dishes!!!). Therefore I believe that sensei is going the international competition route, between schools around the world, since Erina wont be able to participate because she will be headmaster, the whole God's tongue being too OP problem will be eliminated and will add more tension to the competition.
But thats just a theory, an anime theory.... and thats a wrap!!! thanks for reading ╮( ̄▽ ̄)╭
I see what you did there... XD XD
(Spoiler) if you're not caught up
So with Souma getting First Seat, and Erina becoming headmaster, what direction can this manga go in? Souma's dad came back, Souma is the first, and Polar Star residents and allies are apart of the elite ten. Maybe we can get a back story for Souma's mom, but I don't think she was ever made too important (besides the fact she's the reason why Souma's dad regained his love of cooking).
I don't see how any more conflicts can be made since all the conflicts in the beginning and a new conflicts introduced have essentially been resolved.