Most likely, but this reminds me of something I'm not really clear on. Holistically, Toyota's smallest current "new" architecture is DNGA (Daihatsu New Global Architecture), developed by its wholly-owned small car affiliate. Although DNGA has thus far appeared only on some of Toyota and Daihatsu's JDM kei cars, I remember reading that DNGA is "scalable for vehicles in the 1-liter class".
With Toyota ending its agreement with Peugeot Citroën at the end of the current Aygo / 108 / C1's life cycle, it stands to reason that Toyota will turn inward (or to Daihatsu) for its successor. But what architecture will it use? A stretched DNGA? Or a new occasionally rumored TNGA-A? Would a stand-alone TNGA-A be closely related to DNGA much as the relation between the latest Toyota Crown's TNGA-N and Lexus' GA-L?
Final question: Is the Daihatsu DN Trek Concept A-segment or B-segment-sized? (I don't recall offhand).