The Total War series are by far my favorite strategy games of all time. I want more Total War games, but there's really no more eras to do aside from 18th century, which Imperial Glory already did (and did fairly well, though not Total War-quality). What I really want to see them do now is make a fantasy Total War. Basically, a Medieval: Total War but with fantasy races and magic. It would still have the same kinds of battle tactics to make it "realistic", but with extra stuff. Maybe you could train up extremely powerful mages who can bring down half an army by themselves, or raise giant creatures that do more damage than the war elephants of R:TW. I'd really like to see how a fantasy Total War game would turn out.