"Nostalgia trips are not always worth the whole voyage of an entire game revisited. But how about something else: a ‘best of’ HD compilation of iconic levels from series past?
Think: Best of Call of Duty. Or: Best of Halo, Best of Splinter Cell, Best of Metal Gear Solid, Best of Tomb Raider, etc.
Or even better, how about something like: Best of EA Shooters, Best of Activision Shooters? There would be plenty of variety with the titles they could choose, and honour their past achievements."