Why did the mighty morphin power rangers reboot fail?

Obviously, power rangers (at least in the United States) has been suffering a serious drop in popularity in the last several years. RPM wasn't as popular as Bandai hoped and last year's mighty morphin reboot, which was designed to respur interest in the waning American series, died off before the end of the year with Saban purchasing the dying franchise from Disney. The reboot mighty morphin toys didn't sell well at all, and in fact are very common these days in many second hand clothing stores such as Ross. I picked up a several of them on clearence for $1.00 each and they are easily found.

Even the new series, power rangers samarai, doesn't seem to have built up much interest on the Nicktoons channel at all. The toys don't seem to be attracting much interest from toy buyers at all. Has power rangers finally come to an end in the United States? Super Sentai, which power rangers is based on, is more popular than ever in Japan however. But, in the United States, it seems that power rangers is quickly fading in popularity with the American people.

GO, GO, Super Sentai!