For me, I would just keep working on everything as I already do. I may, actually probably would, do more street sparring, monkey line attacks, etc. Just stuff to keep my mind on point. I think that most of us that have had real life ecnounters already, try to be in a constant mode of preparedness. Fights can happen anytime and anywhere. So yeah, if I knew ahead of time, I would just work on stuff to keep myself sharp, maybe work on some tactical stuff and if I know where it will be happening, then assess the environment, etc also.