In the years since, Expanded Universe authors have resurrected Boba Fett due to his fan following, and it appears as if Lucas agrees with them.
Jonathan Rinzler, author of the must-read “Making of” books for the three Original Trilogy movies, is doing a Reddit AmA today and he says George told him Boba Fett survived:
Yes, he does. I have been in meetings with George where he confirms that Fett survived. If it comes from George then itâ€™s true!
With Boba Fett being potentially alive post-ROTJ, that opens the door for a spin-off movie that isn’t another origin story…