Hornby have announced their programme for 2013 - It's all over the web so I won't go into detail here.
I think one loco deserves a mention, the new Sentinel 4wDM industrial shunter. First impressions are that it looks good. Apparently there is a slow-running mechanism underneath too so it ought to run well. Many will wonder what Hornby are doing producing a non-mainline engine. I think it's a clever move.
For a start, the drive system will presumably be related to DMU and EMU systems so the tooling costs will be lower than a bespoke item. The body will still require significant investment but not as much as a steam engine.
The clever part is that the model can easily be produced in a variety of liveries thus increasing potential sales. It's a scale model that can also be eye-catching. I bet there will collectors for them all. I know I want one.