I think he was suggesting that it will be a bot in the hotseat, not a human player.
If so, then I think it would take quite a work to make a good bot for fighting mods, even if the mods are tuned to be unfair for human players. Great if it can be done, but I think it won't be easy.
It would be easier (and perhaps more fun), though, if the hotseat server hosts non-fighting mods where the human players have to do a specific task to win and the bot doesn't have to do anything at all.
Example:
DashSora's
rodeo and arcade basketball mod. Modify the mod a bit so only one player has to ride the rodeo bull or play the arcade basketball. Move the bot somewhere unreachable and make it win by default, either by initial point or trigger magics.
Also, the bot may change some rules (at least turnframes) for each match so it is harder for players to use pre-made moves.