just re-watched the last few episodes of season 3.
Guesses... Jessy winged Gayle and will take him hostage on the road rather then finish the deed. Gus can't afford the downtime in production and Gayle will be too freaked out and will flea this line of work for good. Gus will have no choice but to take back Jessy with Walt as his cookers, but a Walt vs Gus power struggle looms... so does the advancing Mexican cartel that Gus has been beating back.
More Heisenburg please
STOMP