I haven't developed that many courses from scratch, but here's my perspective:
The introductory Physics texts are essentially identical- there is very little variation in the topics covered, and the order they are covered. I have 5 different ones on my shelf (both calc. and algebra), and they are completely interchangable- and that includes web support and online homework resources.
The introductory class has a 'standard' list of topics to cover (ours are given to us by the State of Ohio), so a large part of your job may already be done: the choice on what to cover, the 'learning objectives', etc.
For me, my effort went into deciding what I want the students to get out of the course, choosing the homework problems to assign, and the order the topics are covered: just because rotational motion comes after energy in the book, I don't have to cover rotational motion *after* I discuss energy. I cover linear and rotational motion in parallel, before momentum and energy.
Another area you may want to spend time thinking about is the level of mathematics: you may be teaching a calculus-based course, but I wager your students haven't mastered calculus. How much time do you want to spend on mathematical techniques, and how will you respond to 'weaker' students?
I spent quite some time putting together my syllabus, and I'm happy to email you a copy (email me if you want one) for your reference.