They're not talking about Ace Combat. They're talking about ACE, or Another Century's Episode - a mecha crossover series for PS2. I have all three - they feature robots from Gundam, Macross, and every other famous mecha franchise. Lets you play with all your favorite pilots/robots - good stuff!
And yes, I think they did that in ACE 2 at the end.
Cover for ACE 3: