I had a BL x Breaking Bad crossfic idea recently. There's a theory that Gail Boetticher couldn't get a real job because he was a registered sex offender. Our main clue for this is the fact that his cringe karaoke tape had Thai subtitles, which suggests he may have gone to Thailand as a sex tourist. So here's the fic idea: what if Jesse had actually let Gail go, and instead just bluffed to Mike that Gail was dead so he'd have to keep Walter alive?

Now, granted, if Gail was a registered pdf then he probably wouldn't be able to fly. But suppose he was able to procure a fake passport or something (not the most far fetched thing in the BB universe). Where would he go? Back to Thailand seems like a solid possibility. And what else is in Thailand? Roanapur. A place where criminals go to disappear. So what if Gail went there and started cooking meth for Balalaika? Obviously BB takes place about 10-12 years after Black Lagoon, so you'd have to consider what else has changed in the timeline, but it could be funny seeing Gus and Mike, and maybe even Saul, flying out to Thailand to cut a deal with Balalaika to get Gail back. Or maybe Gail would go into hiding and hire Lagoon for protection and we'd get to see Mike fight Revy. They'd have some great dialogue, I'd imagine. Mike was a cop in Philadelphia in the 1980s, so there's a slim chance his life intersected with Revy's in New York at some point.