Is there any plans to update android beyond 4.0.4?

I notice from TI's site that they have NOT updated their AM37x android build for a while now from Android 4.0.3. I have also searched online on people who have tried porting to other version of android.

Is there instructions on how to start the port if there is no plans for update? There are performance issues with ICS and I would like to move to 4.1.2, 4.2.2 or 4.3 if possible.

Thanks