I quite like the addition of Decker and Illia, so I wonder who else thinks it would've been better if they had "survived" the movie and came back for the sequels.
I was ready for new Decker and Ilia adventures in January 1980.
I was thrilled when I ordered an "In Thy Image" script from then-Lincoln Enterprises and it showed that only
the Ilia Probe (aka Tasha) was extinguished when the new V'ger entity departed with Decker, and that, originally, Ilia was suddenly restored at the end. And, IIRC, Decker sends a hopeful message that he may not be gone forever.
The plan for Decker was that a solution to his return would be explained at the beginning of which ever episode was selected to be Episode #2.
Of course, in the novelization of TMP, the ship also lost a security guard, Phillips, to V'ger's digitization, and Kirk commends him along with Decker and Ilia when he lists them as "missing".
http://memory-beta.wikia.com/wiki/Phillips_%28security%29
BTW, Ilia
did survive (at least for a few panels) in the first LA Times Syndicate's daily comic strip sequel to TMP, which probably started using an "In Thy Image" script and the assumption that Ilia would be a continuing character.
Did you realise that, according to signage used onscreen in ST II, Xon has an office at Starfleet HQ? The sign was auctioned off in the
It's a Wrap! eBay auctions!
I'd always hoped they'd bring Xon and David Gautreaux into TNG or DS9, although DC Comics' "The Origin of Saavik" two-parter, he was sent off on a distant, secret mission... which caused difficulties for Saavik, who'd been bonded with him when first rescued from Hellguard, and she has suddenly entered the
pon farr.
Saavik, as written in one of the story proposals for ST II, was originally a male character, Dr Savik.