First of all, Great Ideas!
In terms of read-ability i would probably go with either 1 or 2, yet the coolest concept is probably number 3. Pretty rough choice, but i would maaaybe go with 3.
To me, having the face of the character in the shot is pretty important, also I think you'll have even more freedom to express what could be inside this galaxy (galaxy tablet)
This will probably be pretty tricky, so I would advise you to look up as much reference as possible ^^