Legendary Encounters: The Matrix
I picked up Legendary Encounters: Matrix yesterday and just played a game (essentially going through the first movie). That was a genuinely impressive standalone experience. If it's sitting at your FLGS (friendly local game store), seriously consider picking it up and I would 100% get it if you can find it for cheap on secondhand market.
I played it as 2-handed solo, there's some interactions that you miss if you play true solo and this is designed to be purely co-op (there are no points for defeating an enemy, you're solely trying to make it to the end of the Second Act with all characters alive and end of the Third Act with at least one character alive)
All that being said, it's definitely a standalone - there are some standees, you interact with the market and particularly the villain deck in a completely different way, so if you're only interested in decks that are compatible with LM, I'd skip this one. And while I don't think it's quite as strong overall as LE: Alien (especially with the LE: Alien expansions), I'd put it as a close second for standalone and this is still in print, so much cheaper.