According to fbschedules.net, the official Colts schedule for 2013 is listed below:

Home -

Houston, Jacksonville, Tennessee, Denver, Oakland, Arizona, St. Louis, AFC East*

Away -

Houston, Jacksonville, Tennessee, Kansas City, San Diego,
San Francisco, Seattle, AFC North*

* Team from that division that finishes in the same spot in the 2012 standings.

So, we're facing Manning, Wilson, Watt x2, and San Francisco in '13. Should be interesting!

And if I'm not mistaken, we play against Dolphins and Bengals as well.

A harder schedule but my prediction that the Colts tops off at 11-5 (or 10-6 at very most) since we would still be in "rebuilding mode". But here's the good news, we should be giving any of these good teams a run for their money. We lose some, we win some but ultimately, go Colts!