Its pretty simple to answer this one I'm afraid: Nothing is going to happen. The a-championship i.e. the concept of a 3rd tier has been completely abandoned by the FAI and is not going to be continued. Lots of senior clubs were giving out about how much of a financial burden it was to have to field an a-championship team. In my view the FAI have made the right decision here due to this fact.
The recession has unfortunately hit domestic football hard!, The FAI are rightfully trying to protect current senior clubs who are feeling the financial strain as well as smaller clubs such as Dynamos and Ramblers from going out of existence altogether!