[mdo7]

For me:

Jikuu Senshi Spielban (only because the footage was used in VR Troopers)
Metalder (another show that was used in VR Troopers)

I mean we already saw Discotek in the US licensing and releasing several Metal Hero toku shows like Juspion, Gavan, Sharivan, and Shaider (one of the three show that VR Trooper used), and recently Jiban.

For Super Sentai show: Himitsu Sentai Gorenger (we already got the manga courtesy of Seven Seas Entertainment, so when is Shout Factory or even Discotek can get the full series in the US in high def. Oh and I believe it had a previous subtitled broadcast in Hawaii, and elsewhere in some part of the US), Battle Fever J, Denjiman, Sun Vulcan, Dynaman, Bioman, Changeman, Flashman, Maskman, Liveman

I mean that's all I can think of. But any other obscure toku shows that hasn't seen the day of light outside of Japan would be welcome.