Hi Gabriel172 here. My idea for KOTOR 3 is as follows
The game should be like the movies and end on a big note.
For the game's story it should have a new character and start out in the Jedi temple as a new student (like fable) and quickly fast forward to the point of your character's position changes from jedi apprentice to jedi knight with a mission to find Revan and the Exile.
Along the way your character meets with some characters from the first two KOTORs to piece together facts about the two characters and forms a party of their own.
Mean While the Sith plan to destroy the republic (no surprise there) by working from the inside with well placed agents slowly killing or coverting officals and jedi alike.
With the help from the characters from the first two games your Character finds Revan and the Exile on some unknown world captured by the sith. Once freed they join your character and head home only to be chased by sith fighters and a sith cruiser.
After you lose the sith your Characters head for the jedi academy on dantoonie
to find only a hand full of jedi escaped death.
The Sith gather strength for the final battle against the jedi while your Characters head for yavin 4 to stop the sith once and for all.
I think ending should be as this.
Carth leads the space battle while the rest lead three groups to the planet surface
revan leads the team from KOTOR 1, the Exile leads the team from KOTOR 2 and your new Main Character lead the team from this game.
Once all teams have made safely into the sith temple a final battle between the new sith lord and the three heroes starts and Revan and the Exile fight the Sith lord, the Exile is quickly thrown down and is about to die when Revan steps in front of the blade taking the hit, this act inrages the Exile who fight with all his heart but is cut down like Revan leaving it all up to your Character to stop the sith lord.
LS side:
you stop the sith by killing the sith lord and return home end of game.
DS side:
you join the sith lord only to kill them and take the title of sith for yourself end of game.
for the game features I guess:
3rd person view
100+ hours (not the short version like the last two please)
more character creation
real-time combat not turn-based
and more group interaction (like love-story between the character and some male/female group member).
thats it hope you all agree.