I think all that is planned for 2008 so far is:
Confirmed: Legends Commander Neyo
(fan choice) Legends Covert Ops Clone Trooper
(fan choice) Legends Shadow Stormtrooper
(fan choice) Legends Utapau Shadow Trooper
(fan choice) Legends Zev Senesca
(fan choice) Legends Pit Droids [v4 - white, tan toolbox]
(shown at Dallas con) Legends Pit Droids [v5 - maroon, tan toolbox]
(shown at Dallas con) Legends Pit Droids [v6 - orange, tan toolbox]
(shown at Dallas con) Legends Sandtrooper [Evolutions? sculpt, Black Pauldron, Dirty]
(according to the Hasbro Q&A) Legends Sandtrooper [Saga-037 sculpt, Black Pauldron, Clean]
(according to Curto) Legends Sandtrooper [Evolutions sculpt, White Pauldron, Dirty]
(according to Curto) Legends 501st Legion Trooper [v2 - #41 sculpt, clean]
(according to Curto)Plus, I'm sure, re-shipments of some of the 2007 Legends to fill out the cases.