I see this as kind of a "Train your fighter!" kinda thing. Like in Yakuza.
Kinda like a simulation mini-game.

And i love that kinda stuff O: So really looking forward to it.
What i'd love is, if we can train them to learn certain behaviour / skills and assign them to kinda like tournaments or so.
Put them on a diet plan, work out plan etc. to gain additional stats.
Something along those lines.