Heheh, nice, I didn't know Apple paid EA to delay Plants vs Zombies 2. Being around my desktop machine almost 24/7, I don't own a smartphone myself.
Two non-Sony/Microsoft/Nintendo franchises I feel are very compatible to the cheap-development + recognizable + touch-compatible + bite-size consumption design are the Ace Attorney (Capcom) and Professor Layton (Level-5) series, which I've recently gotten into. Both of those franchises have made the leap to iOS and Android; I'd be interested in knowing whether they were financially successful or not.
The Phoenix Wright series, especially, seems very low-cost to develop, but doesn't feel low cost.