Chances are very unlikely to not a chance.
IE won't touch the xx.00 departures from Heuston so it's a case of adding a 06.00. They wouldn't for example advance the 07.00 to 06.30 and compromise.
I'm sure they could be a good argument to scrap the 08.00 or even 10.00 (both low capacity and very quiet) and move it to 06.00. The problem is convincing IE could take years before they come around to seeing the advantages from a customer's point of view.
You will only likely see up to 10 minutes cut from the 07.00 so possibly an 09.25 arrival but as IE are very conservative with schedules I couldn't see it due before 09.30.