I cannot imagine that he can publish 1500 games legal. I tried to get approval for my distribution to include some of the known games. In many cases the software companies do not exist anymore (ceased to exist or bought by another company). And even if I found a company the answer was "No" or "we look at it" and no answer. Even if he is willing to pay something for using the games I doubt that he will get the permission for 1500 games (and for a commercial project he needs approval). For me it sounds like Marketing phrases (we are the biggest, best, the future is for us...) or he just includes the games without permission and waits if he gets sued by someone. When he chooses the second then good luck...
