Anime trends run in weird cycles. The last super robot shows before Aquarion Evol were Mazinkaiser SKL, Super Robot Wars OG: The Inspector, and Star Driver a year and a half ago. In real robots we've only got Gundam AGE, Gundam Unicorn, and Eureka Seven AO now; though Rinne no Lagrange from a while back should be getting a second season. Also, Horizon In The Middle Of Nowhere isn't exactly mecha, but it seems to go out of its way to cover every genre it can get away with. Still, I'm not going to complain about a lack of giant robots when we're actually getting a Space Battleship Yamato remake next year.