Good news that assuming GRRM has the say on what HBO do next with his work. I'd hope he does. Aegon's Conquest would be my hope too, as I recall we discussed on that podcast at length. PoV's from each of the great families (starting with the Starks for fan-service) all throughout Season 1 ending that season with a close up on the carving of Aegon's table, pan out onto Aegon and his two sisters. A giant f-off dragon flies past the window behind them.
My fear for War of Conquest would be HBO's dumbing down of characters and the world in general. Would they show all the families? A part of me doubts it. That being said it shouldn't be D&D writing...