I've got to say that would be foolish for Sony to do. Nintendo releases plenty of games each year and sees massive success. Marketing is a major reason but franchising is as well. Sony bails on successful IP regularly and they do not maintain quality levels.
Example Crash and Spyro. But Sony also pretty much ditched Jak and Daxter and Sly. Resistance is not the strongest IP but Sony could out source it I'm sure they could find a developer.
In my opinion Sony needs to focus its marketing on a select five titles. The other titles are left to sell themselves. Sony needs strong IP God Of War is one Little Big Planet etc...etc.. focus a lot of assets on those established IP. But Sony needs to establish at least two new IP.
A major problem with Sony is their over all control over their developers. Sony needs to hand the reigns over to their developers. Go to their studios and say surprise me. Give them adequate funding to make their dream game. Just imagine what David Jaffe could have done with full control of his IP both new and old. Maybe if they had left Naughty Dog to create the Uncharted they had originally envisioned.
Sony doesn't give their developers freedom. Nintendo is so successful because their major developers have tons of freedom. Microsoft pushes their developers a lot harder then Nintendo but they focus on establishing IP.
-JC7
"In God We Trust - In Games We Play " - Joel Reimer
