Moore Street campaigners are preparing to do battle again today.
Campaigners, TD's, Councillors and 1916 relatives will meet at Dublin's Supreme Court to defend last year's ruling which declared the 1916 battlefield site a national monument.
The Heritage Department is appealing the decision.
Patrick Cooney, from the Save 16 Moore Street Committee, said it is disappointing that the Government has decided to appeal the decision at a cost of €5m to the taxpayer.
"We're not backing off now and as we've said before publicly: If the appeal is upheld and we essentially lose we will immediately appeal the appeal," he said.
"So nothing is going to happen in that area. We, the campaign, and the vast majority of people, we believe, don't want a kind of Celtic Tiger out-of-date overscaled shopping centre. They want something better."