They could but will need to convince all left leaning parties and Indos to come on board!! By all accounts, this did not go well last time out with likes of Shortall baulking, not to mind likes of Richboy, Paul Murphy, etc who are not going to give up their cozy gig of shouting from the side lines!!
At some stage, either FF or FG will go in with them, albeit maybe under younger leadership not so linked to Adams and the army council. DOL here in Cork a good operator. If Shinners prepared to look beyond Dublin and border areas for a leader, he'd be more acceptable to FFG and to voters.