The main issue with introducing a new smaller truck to the Scion brand is what it might do to Toyota's Tacoma sales. The Tacoma is the sales leader in the compact truck market, selling 111,824 units, while the runner up, the Ford Ranger only sold 55,600. Scion feels that today's compact trucks have increased in size compared to the earlier models, so there may be room for a smaller pickup.
If Scion does decide to add a small pickup, it would be interesting to see what it would look like. Maybe a modified version of the Hako concept from the 2008 New York Auto Show? In the meantime Scion is set to unveil a new model at this year's New York Auto Show that will hopefully help it regain some of its sales that the brand has lost in the last few years.