The Football Pathways Plan:
"02 STRUCTURE: AN INTEGRATED
APPROACH WITH GREATER SUPPORT
• A clear pyramid with promotion and relegation at all levels.
FAI CUP - TIERS 1 TO 5
FAI AMATEUR CUP - TIERS 3 TO 6"

The fourth tier seems the next logical step of the Football Pathways Plan. When tier 3 is announced - hopefully there will be some word on what to expect next.

If Trim Celtic, as per their announcement, "has made a powerful impression and is now a serious contender for the national league pyramid" - it'll be interesting to see what that actually means.