Regarding canned 32X titles.
Soulstar canned in favour of the Jaguar CD version.
Very doubtful AVP was ever even started.
Capcom USA ' s Chris Kramer was asked about AVP and Dark Stalkers coming to the Sega 32X in 1994..His reply:
"There are going to be a couple Capcom games on the 32X. I'm not
at liberty to discuss either titles or availability, but I can
tell you that we won't have any titles out until the middle of next year at the earliest. Thanks for the interest."
Then after the 1995 E3 Press release by Capcom USA didn't feature the 32X, yet the aging Mega Drive
was..he was asked just what Capcom had planned for the 32X and why it hadn't been included on the list of formats Capcom were supporting.
He replied that as of that point in time, Capcom had NO firm plans for 32X they just remained a licensed developer.
As for Alien Trilogy, again very doubtful work got very far, it started at all.
GTW investigated it from it's original Mega CD annoucement onwards.
Sadly despite a lot of hours being put into clearing up press claims over now lost games, people are still using them as fact on likes of misc Wikipedia entries.