Can you give this boy a escape plan???

Amongst alternatives, dropping down immediately to fight the gators is probably his best bet. They'd certainly be less hard to kill than a full-grown lion, and if he doesn't get to the land soon, he'll have to fight them anyway. Besides, allowing the snake to bite is a roll of the dice, and based on his recent luck, I'd say that's tantamount to suicide.

If he can stun the gators, such as by gouging their eyes out, he can swim away. Alligators can't swim fast for a particularly great distance.