actually, if you play the Sith Warrior story line, you find out that the Emperor never actually dies, it's just his "voice" that dies.....ie him controlling a puppet that orders the empire while he stays hidden.....probably mastering the force.
His speeder IS a reboot of one, the 'Bloodfin' if a modified Razalon FC-20 and in swtor, there is a Razalon FC-1in the Space Jockey's Starfighter Pack.
Proof
http://starwars.wikia.com/wiki/Bloodfin_%28speeder%29